I am confused by this question and dont know where to start. this chapter has been a tough one for me

Foam Products, Inc., makes foam seat cushions for the automotive and aerospace industries. The company's activity-based costing system has four activity cost pools. which are listed below along with their activity measures and activity rates: Activity Cost Pool Activity Measure Activity Rate Supporting direct labor Number of direct labor-hours $ 12 per direct labor-hour Batch processing Number of batches S 99 per batch Order processing Number of orders $ 290 per order Customer service Number of customers S 2,610 per customer The companyjust completed a single order from Interstate Trucking for 3,000 custom seat cushions. The order was produced in four batches. Each seat cushion required 07 direct labor-hours. The selling price was $141.10 per unit, the direct materials cost was $110 per unit, and the direct labor cost was $14.40 per unit. This was Interstate Trucking's only order during the year. Required: Calculate the customer margin on sales to Interstate Trucking for the year. Customer margin