extPPMT function

dynamic extPPMT(
  1. dynamic v1,
  2. dynamic v2,
  3. dynamic v3,
  4. dynamic v4,
)

PPMT(rate, per, nper, pv): principal portion of payment n

Implementation

dynamic extPPMT(dynamic v1, dynamic v2, dynamic v3, dynamic v4) {
  final ipmt = extIPMT(v1, v2, v3, v4);
  final pmt = extPMT(v1, v3, v4);
  return pmt - ipmt;
}