A part requires three processing steps on two machines in the sequence A-B-A. The demand for this part is 10,000 units per year. The company operates six days per week, eight hours per day. Given the following performance data, find the number of each machine needed to meet the demand.

Operation Machine Standard Time Efficiency Reliability Defects 1 A 5 min 108% 98% 3%

2 B 3 min 95% 95% 5%

3 A 3 min 90% 95% 5%