Can you provide an in-depth solution for: Janet gets a job as a waitress.  She makes $10 an hour from wages and another $15 an hour from tips.  She wants to save up 20% of the cost of a $10000 car for a downpayment.  If she works 40 hours a week how many weeks will she need to work to save the down payment?Hey there, could you help me solve this math problem: Janet gets a job as a waitress.  She makes $10 an hour from wages and another $15 an hour from tips.  She wants to save up 20% of the cost of a $10000 car for a downpayment.  If she works 40 hours a week how many weeks will she need to work to save the down payment?