Each customer is first greeted and offered a menu and a tray, which takes 80 seconds per customer. There is one employee at this step. At the second step, the customer places an order for food, which takes an average of 90 seconds. There are two employees in charge of taking food orders. At the third step, the customer places an order for drinks, which takes an average of 55 seconds. There is one employee in charge of taking drink orders. Finally, the fourth step is the cash register where one employee collects the necessary payments from the customer. There is one employee at this last step who takes 40 seconds per guest. What is the average labor utilization? (if Average labor utilization = labor content/cycle time x Number of Employees, and Labor content = p1+p2+p3+p4)