in Excel :
De Paris coffee shop gets an average of 80 customers per night. Owner, wants to calculate whether
he should hire 1,2,3, or 4 waiters. He has determined that the average waiting times will be 7 minutes with
one waiter, 5 minutes with two waiters, 3 minutes with 3 waiters and 2 minutes with 4 waiters. He has
estimated the cost per minute that customers wait is SR1. Using Excel spreadsheet and answer the below
How many waiters should owner hire if the cost of salary per 1 waiter per night is SR150?