Mrs. Walker is tracking the odometer readings on her car for one week to see how much she uses her car for work and how much for her personal use. She starts the week with an odometer reading of 82.112 miles. One way to work equals 5 miles. Mrs. Walker works 5 days per week. She ends the week with the odometer reading of 82,243 miles. How many miles did Mr. Walker drive or personal use?