DDB( cost, salvage, life, period [, factor] )
Returns the depreciation of an asset for a specific time period using the double-declining balance method or some other method you specify

Examples:
DDB( 2400, 300, 10*365, 1, default ) --> 1.31
DDB( 2400, 300, 10*12,1,2) --> 40


FV(rate;nper;pmt;pv;type)
Returns the future value of an annuity based on periodic, fixed payments and a fixed interest rate.
The rate and nper must be calculated using payment periods expressed in the same units. For example, if rate is calculated using months, nper must also be calculated using months.
For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers.

rate: interest rate per period. For example, if you get a car loan at an annual percentage rate (APR) of 10 percent and make monthly payments, the rate per period is 0.1/12, or 0.0083.

nper: total number of payment periods in the annuity. For example, if you make monthly payments on a four-year car loan, your loan has a total of 4 * 12 (or 48) payment periods.

pmt: payment to be made each period. Payments usually contain principal and interest that doesn't change over the life of the annuity.

pv: (optional) present value (or lump sum) of a series of future payments. For example, when you borrow money to buy a car, the loan amount is the present value to the lender of the monthly car payments you will make. If omitted, 0 is assumed.

type: (optional) when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed.

Examples:
Fv(0.005,12,-100,0,1) --> $1239.72
Fv(0.005,24,-100,0,1) --> $2555.91
Fv(0.005,36,-100,0,1) --> $3953.28
Fv(0.005 , 12, 50, -1000, default ) --> $444.90
Fv(0.01, 15*12, -550, 50000, default) --> -$25,020.99


IPmt(rate, per, nper, pv, fv, type)
Returns the interest payment for a given period of an annuity based on periodic, fixed payments and a fixed interest rate.
The rate and nper arguments must be calculated using payment periods expressed in the same units. For example, if rate is calculated using months, nper must also be calculated using months.
For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers.

rate: interest rate per period. For example, if you get a car loan at an annual percentage rate (APR) of 10 percent and make monthly payments, the rate per period is 0.1/12, or 0.0083.

per: payment period in the range 1 through nper.

nper: total number of payment periods in the annuity. For example, if you make monthly payments on a four-year car loan, your loan has a total of 4 * 12 (or 48) payment periods.

pv: present value, or value today, of a series of future payments or receipts. For example, when you borrow money to buy a car, the loan amount is the present value to the lender of the monthly car payments you will make.

fv: (optional) future value or cash balance you want after you've made the final payment. For example, the future value of a loan is $0 because that's its value after the final payment. However, if you want to save $50,000 over 18 years for your child's education, then $50,000 is the future value. If omitted, 0 is assumed.

type: (optional) when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed.

Examples:
IPmt(0.08/12, 24, 12*30, 100000,default,default) --> -$655.59


NPer(rate, pmt, pv, fv, type)
Returns the number of periods for an annuity based on periodic, fixed payments and a fixed interest rate.
For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers.

rate: interest rate per period. For example, if you get a car loan at an annual percentage rate (APR) of 10 percent and make monthly payments, the rate per period is 0.1/12, or 0.0083.

pmt: payment to be made each period. Payments usually contain principal and interest that doesn't change over the life of the annuity.

pv: present value, or value today, of a series of future payments or receipts. For example, when you borrow money to buy a car, the loan amount is the present value to the lender of the monthly car payments you will make.

fv: (optional) future value or cash balance you want after you've made the final payment. For example, the future value of a loan is $0 because that's its value after the final payment. However, if you want to save $50,000 over 18 years for your child's education, then $50,000 is the future value. If omitted, 0 is assumed.

type: (optional) when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed.

Examples:
NPer(0.08,1000,-10000,default,default) --> 20.91 (years)


Pmt(rate, nper, pv, fv, type)
Returns the payment for an annuity based on periodic, fixed payments and a fixed interest rate.
The rate and nper arguments must be calculated using payment periods expressed in the same units. For example, if rate is calculated using months, nper must also be calculated using months.
For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers.

rate: interest rate per period. For example, if you get a car loan at an annual percentage rate (APR) of 10 percent and make monthly payments, the rate per period is 0.1/12, or 0.0083.

nper: total number of payment periods in the annuity. For example, if you make monthly payments on a four-year car loan, your loan has a total of 4 * 12 (or 48) payment periods.

pv: present value, or value today, of a series of future payments or receipts. For example, when you borrow money to buy a car, the loan amount is the present value to the lender of the monthly car payments you will make.

fv: (optional) future value or cash balance you want after you've made the final payment. For example, the future value of a loan is $0 because that's its value after the final payment. However, if you want to save $50,000 over 18 years for your child's education, then $50,000 is the future value. If omitted, 0 is assumed.

type: (optional) when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed.

Examples:
Pmt( 0.08/12, 30*12, 100000, default, default ) --> -$733.76
Pmt(0.07,30,100000, default, default) -- Pmt(7%,30,100K) = -8058,640351


PPmt( rate, per, nper, pv [, fv [, type]] )
Returns the principal payment for a given period of an annuity based on periodic, fixed payments and a fixed interest rate.

Examples:
PPmt(0.08/12, 24, 12*30, 100000, default, default) --> -$78.18


PV(rate, nper, pmt, fv, type)
Returns the present value of an annuity based on periodic, fixed payments to be paid in the future and a fixed interest rate.
The rate and nper arguments must be calculated using payment periods expressed in the same units. For example, if rate is calculated using months, nper must also be calculated using months.
For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers.

rate: interest rate per period. For example, if you get a car loan at an annual percentage rate (APR) of 10 percent and make monthly payments, the rate per period is 0.1/12, or 0.0083.

nper: total number of payment periods in the annuity. For example, if you make monthly payments on a four-year car loan, your loan has a total of 4 * 12 (or 48) payment periods.

pmt: payment to be made each period. Payments usually contain principal and interest that doesn't change over the life of the annuity.

fv: (optional) future value or cash balance you want after you've made the final payment.
For example, the future value of a loan is $0 because that's its value after the final payment. However, if you want to save $50,000 over 18 years for your child's education, then $50,000 is the future value. If omitted, 0 is assumed.

type: (optional) when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed.

Examples:
Pv(0.06/12, 10*12, 100, default, default) --> -$9007.35


Rate(nper, pmt, pv, fv, type, guess)
Returns the interest rate per period for an annuity.
For all arguments, cash paid out (such as deposits to savings) is represented by negative numbers; cash received (such as dividend checks) is represented by positive numbers. Rate is calculated by iteration. Starting with the value of guess, Rate cycles through the calculation until the result is accurate to within 0.00001 percent. If Rate can't find a result after 20 tries, it fails. If your guess is 10 percent and Rate fails, try a different value for guess.

nper: total number of payment periods in the annuity. For example, if you make monthly payments on a four-year car loan, your loan has a total of 4 * 12 (or 48) payment periods.

pmt: payment to be made each period. Payments usually contain principal and interest that doesn't change over the life of the annuity.

pv: present value, or value today, of a series of future payments or receipts. For example, when you borrow money to buy a car, the loan amount is the present value to the lender of the monthly car payments you will make. fv: (optional) future value or cash balance you want after you've made the final payment.
For example, the future value of a loan is $0 because that's its value after the final payment. However, if you want to save $50,000 over 18 years for your child's education, then $50,000 is the future value. If omitted, 0 is assumed.

type: (optional) when payments are due. Use 0 if payments are due at the end of the payment period, or use 1 if payments are due at the beginning of the period. If omitted, 0 is assumed.

guess: value you estimate will be returned by Rate. If omitted, guess is 0.1 (10 percent).

Examples:
RATE( 4*12, -200, 8000, default, default, default) -- 0,007701472 = 1%
RATE( 1, -10, 1, default, default, default) -- 9 = 900%
RATE( 1,-200,12,10,0,0.5 ) -- = 14,83333333 = 1483%
RATE( 1,-200,12,10,1,0.5 ) -- = -0,946808511 = -95%
RATE( 1,-100,78,-1,0, default ) -- = 0,294871795 = 29%
rate(10*1, -1000, 65000, default, default, default) -- = -0,246951723 = -25%


Rate(
       30,
       Pmt(0.07,30,100000,default,default),
       100000-3500,default,default,default) -- = 0,073586747 = 7.36%


SLN( cost, salvage, life )
Returns the straight-line depreciation of an asset for a single period.

Examples:
SLN(30000,7500,10) -- = 2250


SYD( cost, salvage, life, period )
Returns the sum-of-years' digits depreciation of an asset for a specified period.

Examples:
SYD(30000,7500,10,1) -- = 4,090.91
SYD(30000,7500,10,10) -- = 409.09