can someone answer and explain please

Delauder Enterprises makes a variety of products that it sells to other businesses. The company's activity-based costing system has four activity cost pools for assigning costs to products and customers. Details concerning that ABC system are listed below: Activity Cont pool Supporting assembly Processing batches Processing orders Serving customers Activity Measure Direct labor-hours (DLS) Number of batches Number of ordern Number of customers Activity Rate $ 3.45 per DLHI $ 193.30 per batch $ 83.05 per order $1,508.00 per customer "The cost of serving customers. $1,608.00 per customer is the cost of serving a customer for one year. Grennon Corporation buys only one of the company's products. Grennon purchased a total of $27,825.00 worth of the product last year. Direct materials related to Grennon's purchases totoled $12,525.00 and direct labor related to Grennon's purchases totaled $5,925.00 Additional details of last year's purchases of this product are listed below. Number of batches Number of orders Direct labor-hours required 5 batches 2 orders 375 hours According to the ABC system, the customer margin for Grennon this past year was closest to