Every product has a price, every product listed on an order has a price, these aren't necessarily the same thing. What if the order includes something that the manager threw in for free to sweeten the deal? The price of that product on that order is zero, but the product's list price at any given point in time was not zero.
Every product has a price, every product listed on an order has a price, these aren't necessarily the same thing. What if the order includes something that the manager threw in for free to sweeten the deal? The price of that product on that order is zero, but the product's list price at any given point in time was not zero.