/// <summary>
/// Return the basic rate for this tax
/// </summary>
/// <param name="limitBase"></param>
/// <returns></returns>
public decimal PercentPerTax(decimal limitBase)
{
// Find the interval for this limitBase
TaxInterval interval = this.TaxIntervals.Find(limitBase);
decimal intervalRate = interval.Value;
switch (this.TaxBase)
{
case TaxBase.PercentPerTax:
if (!String.IsNullOrEmpty(this.TaxOnTax) && this.TaxOnTaxInstance != null)
{
return((intervalRate * this.TaxOnTaxInstance.Value) / 100);
}
else
{
return(decimal.Zero);
}
case TaxBase.PercentPerGross:
if (!String.IsNullOrEmpty(this.TaxOnTax) && this.TaxOnTaxInstance != null)
{
return(intervalRate + ((intervalRate * this.TaxOnTaxInstance.Value) / 100));
}
else
{
return(intervalRate);
}
case TaxBase.PercentGrossOnNet:
return(PercentGrossOnNet(intervalRate));
case TaxBase.AmountByUnit:
case TaxBase.PercentPerNet:
default:
return(intervalRate);
}
}
/// <summary>
/// Determine whether any portion of the given amount is within the given interval
/// </summary>
/// <param name="interval"></param>
/// <param name="amount"></param>
/// <returns></returns>
/// <example>
/// Interval = $25 - $100
/// Amount = $10 => FALSE
/// Amount = $50 => TRUE
/// Amount = $150 => TRUE
/// </example>
public static bool AmountInInterval(this TaxInterval interval, decimal amount)
{
return((interval.TaxLimitMin == decimal.Zero) || (interval.TaxLimitMin < amount));
}
/// <summary>
/// Determine whether the given amount is wholly within the interval
/// </summary>
/// <param name="interval"></param>
/// <param name="amount"></param>
/// <returns></returns>
/// <example>
/// Interval = $25 - $100
/// Amount = $10 => FALSE
/// Amount = $50 => TRUE
/// Amount = $150 => FALSE
/// </example>
public static bool WholeAmountInInterval(this TaxInterval interval, decimal amount)
{
// return if the amount is in within the interval or equal to either end.
return((interval.TaxLimitMin == decimal.Zero || interval.TaxLimitMin <= amount) &&
(interval.TaxLimitMax == decimal.Zero || interval.TaxLimitMax >= amount));
}
