A fast food restaurant has drive-through window that can handle a maximum of 60

Question

A fast food restaurant has drive-through window that can handle a maximum of 60 cars per hour. The drive through is attended by one employee that also acts as cashier. The average sale per order is $7.00. A proposal has been made to add two additional workers. With the new system the drive-through window will be able to handle up to 100 orders per hour.

Based on the worker productivity, would you recommend the change? (Show calculations)

Based on dollar productivity and assuming that each worker cost $3.00 per hour, would you recommend the change (show calculations)

Thank you!

Explanation / Answer

Based on worker productivity:
Before: 60 cars and 1 person working=60cars/person
After: 100 cars and 3 people working=33.3cars/person
No.
Based on dollar productivity:
Before: $420 (7*60) in sales and $3 (3*1) in payroll=$417 profit
After: $600 (7*100) in sales and $9 (3*3) in payroll=$591 profit

yes

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