private decimal GetMonthlyPaymentByPmtFormula(LoanEntity loanInfo)
{
var percentInDecimalFormat = loanInfo.Percent / 100 / 12;
var numberOfPaymentPeriods = loanInfo.TermInYears * 12;
var result = (percentInDecimalFormat * loanInfo.LoanAmount) / (1 - (decimal)Math.Pow((double)(1 + percentInDecimalFormat), numberOfPaymentPeriods * -1));
return(result);
}
public PaymentEntity CalculatePayments(LoanEntity loanInfo)
{
var paymentInfo = new PaymentEntity();
loanInfo.LoanAmount -= loanInfo.DownPaymentAmount;
paymentInfo.MonthlyPayment = GetMonthlyPaymentByPmtFormula(loanInfo);
paymentInfo.TotalPayment = loanInfo.TermInYears * 12 * paymentInfo.MonthlyPayment;
paymentInfo.TotalInterest = paymentInfo.TotalPayment - loanInfo.LoanAmount;
return(paymentInfo.RoundPaymentResultTo(2));
}
