Access the computer in the garage and click on the command prompt icon in the task bar at the top right. A box you can type in will appear. Enter one of the three codes in the box, or skip repairs instantly after developer mode is enabled.

Effect	Code
Allow the order to be marked complete without doing repairs.	Hold [Left Shift] and [F1] when clicking the "Show Repair Order"
Developer mode on	devMode.on
Increase cash on hand by 250	moneyplease
Resets bank loan	resetloan