This is a calculation question. Barry's Tire Service completed 100 tire changes, in an eight-hour day with his standard crew of six mechanics. The price of a tire change job is $20 and a mechanic costs $25 per hour. The materials cost for a day was $2,000, and overhead cost was $800 per day. What is the multifactor productivity per day? O 0.5 O 038 O 0.6 O 03