We have a process wih 3 employees each ringing up customers at their cash registers (serve customer from beginning to end). Process times are employee 1 = 25 seconds per customer, employee 2 = 33 seconds per customer and employee 3 = 50 seconds per customer. What is the process capacity?
a. 144 customers per hour
b. 108 customers per hour
c. 72 customers per hour
d. 56 customers per hour