In order to be profitable, John has learned to provide superior services to his customers, including free price quotes. He builds in his profit- margin of 25% to all quotes by first computing his total costs, then adding 25% of that number to determine how much to charge the customer. Using his knowledge of the expenses for labor, supplies and equipment, he has developed the following information:

- 1 gallon of paint will cover approximately 400 square feet
- For every 2 gallons of paint for a wall, you need 1 gallon of paint for the trim
- John has a deal with the local paint store and can get paint he wants for $25 per gallon
- Every job requires 5 tubes of caulk ( $2.50 each) and 5 clean paint brushes ($5 each).
- John finds that a painter can apply a gallon of paint in about 8 hours.

a. Martin just finished working on a job in which he spent 7 hours on Monday doing prep work and 8.5 hours on Wednesday painting. How much money doe John owe him?