Account Functions; new CalculateRebate function added

A new function "CalculateRebate" has been added to finBL.AccountFunctions, i.e. finBL.AccountFunctions.CalculateRebate.

This calculates the Rebate due for a Value, given parameters such as the method and period covered.

Parameters include:

• value As Decimal
• The Value.
• calculationMethod As isefinElementCreditCalculationMethod
• The Rebate Method.
• calculationLess As Double
• Extra percentage to deduct from the calculated Rebate, as in RO78 less 10%.
• dateStart As Date
• The start date of the overall period the Value applies to.
• dateEnd As Date
• The end date of the overall period the Value applies to.
• dateRebate As Date
• The date to calculate the Rebate as at. If prior to dateStart rebate=Value, if after dateEnd rebate=0.
• ByRef rebate As Decimal
• The Rebate calculated.
• Optional frequencyCycle As String = ""
• If "Proportional" method is used, the frequency of payments within the overall period.
• Optional ByRef message As String = ""
• Returns a message describing how the Rebate was calculated.