conversations.from: human
conversations.value: I need a clearer understanding of how to solve: There are four lamps in Valerie's room. All of them are burnt out, so she needs to buy new light bulbs. She needs 3 small light bulbs and 1 large light bulb. She has $60 to spend. If small light bulbs cost $8 and large light bulbs cost $12, how much money will Valerie have left over?
conversations.from: assistant
conversations.value: She will spend 3*$8=$24 on small light bulbs.
  In total she will spend $24+$12=$36 on the 4 light bulbs.
  She will have $60-$36=$24 left over.