Well Sarah, it's Friday night, the weekend before final exams start. Everyone's been sweating it to get assignments handed in and cram for finals. You heard that there's a house party tonight but your boyfriend, Rob, is working AGAIN. Why not go anyway and unwind before you hit the books? You know, have a little fun?

You decide to borrow your mom's car (with her permission as long as you pay for the gas) to go to the party. You're going to pick up your best friend Megan. On the way to Megan's house you stop at a bank machine and take out $20. You pick up Megan at her house. She shows you the fake ID that her brother got her. It looks pretty convincing. You and Megan decide to:

Stop at the liquor store to buy some alcohol for the party. There goes the $20. Now you don't have any money left for gas! Oh well, it's not quite on empty. You hope there's enough gas to get you home!	Go straight to the party. Oh yeah, you stop for $10 worth of gas on the way. Now you have $10 left.