A company has two products: A1 and B2. It uses activity-based costing and has prepared the following analysis showing budgeted cost and activity for each of its three activity cost pools: Budgeted Activity Product A1 Product B2 Activity Cost Pool Activity 1 Activity 2 Activity 3 Budgeted Cost $55,000 $70,000 $94,000 1,900 2,940 7,900 5,500 5,460 1,500 Annual production and sales level of Product A1 is 9,180 units, and the annual production and sales level of Product B2 is 23,010 units. What is the approximate overhead cost per unit of Product A1 under activity-based costing