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  * BroadleafCommerce Framework
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Interface to centralize the promotion rounding functionality found in several of the Promotable classes.

public interface PromotionRounding {
It is sometimes problematic to offer percentage-off offers with regards to rounding. For example, consider an item that costs 9.99 and has a 50% promotion. To be precise, the offer value is 4.995, but this may be a strange value to display to the user depending on the currency being used.
    boolean isRoundOfferValues();

Returns the rounding mode to use for rounding operations.

    RoundingMode getRoundingMode();

Returns the scale to use when rounding.

    int getRoundingScale();
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