Food Goblin Supermarkets use both cashiers and baggers to serve
customers at check out. During the first 6 hours of each workday
(Monday–Friday), 4 cashiers and 2 baggers serve approximately 20
customers per hour. A cashier and a bagger who require
approximately 5 minutes at checkout and 5 minutes at bagging serve
each customer.

a. Calculate the utilization of both cashiers and baggers.

b. Assume that both baggers and cashiers are cross-trained to
perform both activities so that they can serve customers
independently. Customers are now both checked and their groceries
bagged by one individual. Further, assume that it takes 12 minutes
for one individual to both cash out and bag each customer’s
groceries. Calculate the utilization of this new group of 6
cross-trained employees.