A paraglider manufacturer makes a standard model and a custom model. using the companys activity-based costing system compute customer margin.

activity cost pool activity rate
Supporting manufacturing $20 perdirect labor-hour
Orderprocessing $194 per order
custom designing $268 per custom design
customer service $430 per customer

standard custom
number of gliders 16 3
number of orders 2 3
number of custom designs 0 3
direct labor-hours per glider 30.5 33
selling price per glider $1,625 $2,370
direct materials cost per glider $476 $586

Find the customer margin......

i already know how to find it but for some reason i cant find the correct answer. i keep coming up with $8072 and that is a wrong answer. I added up all the expenses and subtracted it from the total sales. im stuck and don't know why.