How to pay 50/50 on order/on payment collection?

Summary:

The customer scenario here is to calculate the commission earned based on the tier achieved when the order is processed. This commission rate is tied to the order and the paid commission is 50% of the total earned amount. (e.g. 10K order, tier 1 -> 10% 0-100k YTD) The rate associated with the order is 10% and the total earned commission for the order is $1000 paid 50% or $500 on order and the remaining as receivable invoices are collected (i.e. paid). Therefore, if invoice #1 is $500 and is collected the commission payment owed to salesrep is 50% of total earned * collected amount * rate (.5 * 1000 * 500 * .1) = $250

if the invoice #2 is also $500 and is collected the commission payment owed to salesrep would be the same and the entitled commission would be fully paid.