A certain part is produced in a batch size of 50 units and requires a sequence of 8 operations in the plant. The average set-up time and average non-operation time per operation are3 hours and 7 hours, respectively. The average operative time per machine per part is 6 minutes. What is the manufacturing lead time?

• A. 100 hours                     
• B. 120 hours
• C. 150 hours                     
• D. 180 hours