conversations.from: human
conversations.value: Bob orders a dozen muffins a day for $0.75 each and sells them for $1.5 each.  How much profit does he make a week?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: He buys them for 12*.75=$9
  He sells them for 12*1.5=$18
  So he makes 18-9=$9 per day
  That means he makes 9*7=$63 per week