prompt: John earned $18 on Saturday but he only managed to earn half that amount on Sunday. He earned $20 the previous weekend. How much more money does he need to earn to give him the $60 he needs to buy a new pogo stick?
messages.content: John earned $18 on Saturday but he only managed to earn half that amount on Sunday. He earned $20 the previous weekend. How much more money does he need to earn to give him the $60 he needs to buy a new pogo stick?
messages.role: user
messages.content: John earnt $18 / 2 = $<<18/2=9>>9 on Sunday.
  In total, John made $18 + $9 + $20 = $<<18+9+20=47>>47 over the two weekends.
  John needs $60 - $47 = $<<60-47=13>>13 extra to buy the pogo stick.
  #### 13
messages.role: assistant