/// <summary>
/// Define whether tax definition applies and return calculated amount.
/// </summary>
/// <param name="item"></param>
/// <param name="taxAmount"></param>
/// <returns></returns>
protected bool AppliesTaxItem(decimal grossAmount, TaxDefinitionItem item, out decimal taxAmount)
{
if (item == null)
{
throw new ArgumentException("Undefined tax item");
}
taxAmount = 0m;
if (grossAmount >= item.FromAmountIncluding && grossAmount < item.UpToAmount)
{
if (item.UpToAmount >= TaxDefinitionItem.MaxUpToAmount)
{
taxAmount = item.BaseTaxAmount + (grossAmount - item.FromAmountIncluding) * item.PercentAboveFrom;
}
else
{
taxAmount = item.BaseTaxAmount;
if (grossAmount >= item.UpToAmount)
{
taxAmount += (item.UpToAmount - item.FromAmountIncluding) * item.PercentAboveFrom;
}
else
{
taxAmount += (grossAmount - item.FromAmountIncluding) * item.PercentAboveFrom;
}
}
return(true);
}
else
{
return(false);
}
}
protected void AddExplanation(Salary salary, TaxDefinitionItem item, decimal amount)
{
if (salary.TaxExplanation == null)
{
salary.TaxExplanation = new Dictionary <TaxDefinitionItem, decimal>();
}
salary.TaxExplanation.Add(item, amount);
salary.TaxAmount += amount;
}