Mr. Roble is buying a lot of music on iTunes this week. On Monday, his bank account was at $30. On Tuesday, he bought 7 songs at $1.99 each. On Wednesday, he deposited $10 into his account. On Thursday, he bought 4 albums for $7.99 each. On Friday he received a check from work and deposited some of the check to get his account balance back to 0.