Step 2.) On the game board, read the transaction in the bubble to find out how much change you owe the customer
Step 3.) Give customer change by clicking on the coins under the cash register. For example, if you owe the customer $0.35, you would click once on a quarter, and once on a dime.
Step 4.) Click "give change" when you are done. Repeat the process to make as many sales as possible in three minutes.