Invoiced value over the same lines at list price on the invoice date. Against the agreed discount from the price agreement, the remainder is the unagreed discount, given line by line through overrides. Per customer, per product, per rep.
Without one, every line before a price change looks discounted.
Seventy percent at an agreed thirty is on plan. The unagreed remainder is the leak.
Invoiced value divided by the same lines valued at list price on the invoice date, by customer and family, and against the agreed discount.
A customer's lines at list would be $500,000. It was invoiced $410,000: 82 percent. Its agreement allows 12 percent off, so six points were given away line by line.
List prices not dated. After a list increase, every old invoice looks heavily discounted.