Stroth corporation uses activity-based costing to compute product margins. overhead costs have already been allocated to the company's three activity cost pools-machining, order filling, and other. the costs in those activity cost pools appear below:
machining $5,400
order filling $2,500
other $13,100
machining costs are assigned to products using machine-hours (mhs) and order filling costs are assigned to products using the number of orders. the costs in the other activity cost pool are not assigned to products. activity data appear below:

mhs (machining) orders (order filling)
product c4 9,800 500
product l4 200 500
finally, sales and direct cost data are combined with machining and order filling costs to determine product margins.
product c4 product l4
sales (total) $46,900 $25,300
direct materials (total) $15,100 $11,500
direct labor (total) $22,300 $10,900
what is the product margin for product c4 under activity-based costing?