Beaver Company manufactures coffee tables and uses an activityminusbased costing system to allocate all manufacturing conversion costs. Each coffee tables consists of 20 separate parts totaling $ 220 in direct​ materials, and requires 7 hours of machine time to produce. Additional information​ follows:Activity Allocation Base Cost Allocation Rate Materials handling Number of parts $2.00 per part Machining Machine hours $4.10 per machine hour Assembling Number of parts $3.00 per part Packaging Number of finished units $7.00 per finished unit What is the cost of materials handling per coffee table? a. $12 b. $60 c. $90 d. $13