Returns the payment on the principal for a given investment based on periodic, constant payments and a constant interest rate.
| Name | Type | Description |
| arg1 | number | Is the interest rate per period. For example, use 6%/4 for quarterly payments at 6% APR. |
| arg2 | number | Specifies the period and must be in the range 1 to nper. |
| arg3 | number | Is the total number of payment periods in an investment. |
| arg4 | number | Is the present value: the total amount that a series of future payments is worth now. |
| arg5 | number | Is the future value, or cash balance you want to attain after the last payment is made. |
| arg6 | number | Is a logical value: payment at the beginning of the period = 1; payment at the end of the period = 0 or omitted. |