Question

Suppose you were starting in the office cleaning service. We have spent $315 on equipment. To clean an office, you use four dollars worth of supplies. You charge $25 per office. How many officers must clean to break even?

Answer 1

Number of offices to be cleaned to cover the cost of equipment =15

Cost of equipment =$.315 Cost of supplies =$.4 Charge per office =$.25

Number of offices to be cleaned to cover the cost of equipment =x

Then -25x − 4x =315

21x =315

x=315

21=15

Number of offices to be cleaned to cover the cost of equipment =15