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 Cost Pool Supporting assembly Processing batches Processing orders Serving customers Activity Measure Activity Rate Direct labor-hours (DLHS) $ 3.45 per DLH Number of batches $ 193.30 per batch Number of orders $ 83.05 per order Number of customers $1,608.00 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. The details of last year's purchases of this product are listed below: 1,500 units 5 batches 2 orders Number of units purchased Number of batches Number of orders Direct labor-hour requirement Selling price Direct materials cost Direct labor cost 0.25 DLHS per unit $18.55 per unit $ 8.35 per unit $ 3.95 per unit According to the ABC system, the total cost of the activity "Processing batches" for this customer this past year was closest to