Telecom uses activity - based costing to allocato all manufacturing conversion costs. Telecom produces cellular telephones, each phone has $50 or direct materials, includes 50 parts and requires 6 hours of machine time. Additional information follows: Activity Allocation Base Cost Allocation Rate Materials handling Number of parts $3,50 per part Machining Machine hours $4.00 por machine hout Assembling Number of parts $1.00 per part Packaging Number of finished units $6.00 per finished unit What is the cost of assembling per phone? O A $36 OB. $24 C. $175 OD. $50