conversations.from: human
conversations.value: Denver uses 7 pieces of wood for each birdhouse and he pays $1.50 for each piece of wood. If he makes a $5.50 profit per birdhouse, how much will Denver charge to Danny for buying two birdhouses?
  How to solve this?
conversations.from: assistant
conversations.value: The cost for making one birdhouse is $1.50 x 7 = $10.50.
  So the selling price of one birdhouse is $10.50 + $5.50 = $16.
  Thus, Denver will charge Danny $16 x 2 = $32 for the two birdhouses.