Modifier Application Sequence when Multiple Modifiers Apply to a Single Line

How does the pricing engine determine which order to apply modifiers for a single line?  We have a List Price of $1,000.  When we go to view adjustments we see the starting point of 1,000.  Then, we have a discount of 10% and a surcharge of $40.  We would like to have the system show the List Price then the discount and finally the surcharge so the Customer Service Rep can recap to the customer how the end price was achieved.  It seems inconsistent from order to order.  Sometimes it shows discount first and other times surcharge first.  We tried