conversations.from: human
conversations.value: A father is building a playset for his son and needs to purchase lumber, nails, and fabric.  When he started planning the project, the necessary lumber cost $450, the nails cost $30, and the fabric cost $80.  However, recent economic inflation has caused the price of lumber to increase by 20%, the price of nails to increase by 10%, and the price of fabric to increase by 5%.  In dollars, how much more money will it cost to complete the project now (after inflation) than it would have when the father began planning?
  Solve it.
conversations.from: assistant
conversations.value: First, the initial, pre-inflation, cost of the project was 450 + 30 + 80 = $560.
  Then, the price of the lumber increased to 450*1.20 = $540.
  Similarly, the price of the nails increased to 30*1.10 = $33.
  And the price of the fabric increased to 80*1.05 = $84.
  Therefore, the new, post-inflation, cost of the project is 540 + 33 + 84 = $657.
  Thus, the cost has increased by 657 - 560 = $97.