Telecom uses activity-based costing to allocate all manufacturing conversion costs. Telecom produces cellular telephones; each phone has $40.00 of direct materials, includes 30 parts and requires 3 hours of machine time. Additional information follows:

Activity Allocation Base Cost Allocation Rate
Materials handling Number of parts $0.50 per part
Machining Machine hours $14.00 per machine hour
Assembling Number of parts $1.00 per part
Packaging Number of finished units $2.00 per finished unit

What is the cost of machining per phone?

A. $30.00

B. $42.00

C. $6.00

D. 15.00