The calculation engine uses a defined calculation processing interface designed to support calculations for a wide variety of purposes. While it is not confined to calculations using in billing, it is a primary tool for calculating bills and the interface closely mirrors the bill data structure.
The key elements in the calculation processor API are:
A collection of value details that can be pre-populated and added to by calculation rules. These value details form the basis of many computations performed by the rules.
A collection of calculation lines which define calculated amounts and other attributes that control how these amounts contribute to the calculation. Calculation lines are the primary results of the computations performed by the rules
Refer to Designing Your Calculation Rules and Groups for information about the calculation processor interface and further details for designing your rules.
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