Answer:
Instructions for changing the oil for women:
1) Stop at Jiffy Lube when the mileage reaches 3,000 miles since the last oil change.
2) Drink a cup of coffee.
3) Issue a check 15 minutes later and leave with a properly maintained vehicle.
Money spent:
Oil change: 20.00 USD
Coffee: 1.00 USD
Total amount: 21.00 USD