public int CalcMonthsSaved(LoanObjectModel loan)
{
int monthsRemaining = loan.years;
int months = loan.years;
double principal = loan.principal;
double monthRate = loan.rate;
double payment = loan.monthlyPayment;
double principalPayment = 0;
double interestPayment = 0;
double extra = loan.extraPayment;
for (int i = 0; i < months; i++)
{
interestPayment = principal * monthRate;
principalPayment = payment - interestPayment;
principalPayment += extra;
principal -= principalPayment;
monthsRemaining--;
if (principal < 0)
{
break;
}
}
monthsSaved = monthsRemaining;
return(monthsRemaining);
}
/// <summary>
/// convert yearly interest to monthly interest
/// </summary>
/// <param name="loan"></param>
/// <returns></returns>
public double calcInterest(LoanObjectModel loan)
{
double interest = 0;
int months = loan.years;
double principal = loan.principal;
double monthRate = loan.rate;
double payment = loan.monthlyPayment;
double principalPayment = 0;
double interestPayment = 0;
double extra = loan.extraPayment;
if (loan.extraPayment > 0)
{
for (int i = 0; i < months; i++)
{
interestPayment = principal * monthRate;
principalPayment = payment - interestPayment;
principalPayment += extra;
principal -= principalPayment;
interest += interestPayment;
if (principal < payment)
{
interest += principal * monthRate;
break;
}
}
}
else
{
interest = loan.monthlyPayment * loan.years - loan.principal;
}
return(interest);
}
/// <summary>
/// get mortgage payment
/// </summary>
/// <param name="loan"></param>
/// <returns></returns>
public double MonthlyPayment(LoanObjectModel loan)
{
double intermediate;
months = SetMonths(loan.years);
monthlyRate = SetMonthlyInterest(loan.rate);
loan.principal -= loan.downPayment;
monthlyRate += 1;
intermediate = Math.Pow(monthlyRate, months);
monthlyRate -= 1;
loan.monthlyPayment = monthlyRate * intermediate;
intermediate -= 1;
loan.monthlyPayment /= intermediate;
loan.monthlyPayment *= loan.principal;
loan.monthlyPayment += loan.interest_Utilities;
return(loan.monthlyPayment);
}
public double TotalAmountToBePaid(LoanObjectModel loan)
{
moneySaved = monthsSaved * loan.monthlyPayment;
return(moneySaved);
}