conversations.from: human
conversations.value: Find the answer to this math problem: Annabelle is saving for a phone that costs $400. She already has $80 in her savings. Her first job, where she earns $10 per hour, pays her for 20 hours of work. She is also paid for 15 hours of work at her second job, where she earns $5 an hour. In dollars, how much money does Annabelle still need to save?
conversations.from: assistant
conversations.value: Subtracting Annabelle’s initial savings shows that she still needs to save $400 – $80 = $320.
  From her first job, she earns $10 * 20 hours = $200.
  From her second job, she earns $5 * 15 hours = $75.
  She therefore still needs to save $320 – $200 – $75 = $45.