Purpose:
Returns the interest payment for a given period for an investment based on periodic, constant payments and a constant interest rate
Syntax:
Java Class: com.hyperion.calcmgr.common.excel.cdf.ExcelFinancialFunctions.IPMT(double,double,double,double,double,double)
CDF Spec: @CalcMgrExcelIPMT(rate, per, nper, pv, fv, type)