public double GetStraightLineAmount(DepreciationCalculatorInputModel inputModel)
{
var straightLineAmountPerMonth = CalculateStraightLineAmountPerMonth(inputModel);
var monthsOwned = CalculateMonthsOwned(inputModel);
return(CalculateDepreciationAmount(straightLineAmountPerMonth, monthsOwned));
}
private int CalculateMonthsOwned(DepreciationCalculatorInputModel inputModel)
{
var adjustFinanicalYearEnd = AdjustFinanicalYearEnd(inputModel.FinancialYearEnd);
return(GetMonthsOwnedForCurrentFinancialYear(adjustFinanicalYearEnd, inputModel.PurchaseDate, inputModel.UsefulLifeInYears));
}
private double CalculateStraightLineAmountPerMonth(DepreciationCalculatorInputModel inputModel)
{
var maxStraightLineAmountPerMonth = (inputModel.AssetCost - inputModel.SalvageValue) / inputModel.UsefulLifeInYears / MonthsInYear;
return(maxStraightLineAmountPerMonth);
}