Carlos wants to purchase a new computer and go to the Caribbean for spring break. The computer is priced at $1,299, and the vacation is priced at $750. He has only $1,537 in his checking account, so he cannot afford to purchase both. After much thought, Carlos buys the computer and writes a check for $1,299. Identify what role money plays in each of the following parts of the story. Hint: Select each role only once.