Walsh Corporation uses an activity-based costing system to assign overhead costs to products, In the first stage, two overhead costs equipment depreciation and supervisory expense-are allocated to three activity cost pools--Mach 9, Order Filling, and Other--based on resource consumption. Data to perform these allocations appear below. Distribution of Resource Consumption Across Activity Cost Pools: In the second stage, 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 for the company's two products follow: Activity: MHs (Machining) Orders (Order Filling) In the second stage, 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 for the company's two products follow: Activity: The activity rate for the Machining activity cost pool under activity-based costing is closest to: Select one: a. $2.82 per MH b. $5.30 per MH c. $3.18 per MH d. $18.00 per MH