Grouping ruleRule that is used to specify how the invoicing elements of the source document are grouped in the destination document.For an element in amount:1st quote (order/shipment/invoice): Only the value of the 1st document is taken into accountSum of the quote amounts (order/shipment/invoice): The value of all the documents is totaled.Minimum amount: Only the smallest amount is taken into accountMaximum amount: Only the largest amount is taken into accountFor an element in percentage:1st quote (order/shipment/invoice): Only the value of the 1st document is taken into accountMinimum percentage: Only the smallest percentage is taken into accountMaximum percentage: Only the largest percentage is taken into accountAverage percentage: A recalculation of a percentage according to the part in amount represented by each of the amountsMinimum amount percentage: Only the percentage corresponding to the smallest amount is taken into accountMaximum amount percentage: Only the percentage corresponding to the largest amount is taken into account