conversations.from: human
conversations.value: Mary needs school supplies. She has 6 classes and needs 1 folder for each class. She also needs 3 pencils for each class. She decides that for every 6 pencils she should have 1 eraser. She also needs a set of paints for an art class.  Folders cost $6, pencils cost $2, and erasers cost $1. If she spends $80, how much did the set of paints cost in dollars?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: Mary needs 6*1= 6 folders.
  Mary needs 6*3= 18 pencils.
  Mary needs 18/6= 3 erasers.
  Mary spends 6*6= $36 on folders.
  Mary spends 18*2= $36 on pencils.
  Mary spends 3*1= $3 on erasers.
  Mary spends 36+36+3= $75 on all the supplies except the paints.
  Mary spends 80-75= $5 on the paint set.