prompt: A sack of rice, which is 50 kilograms,  costs $50. If David sells it for $1.20 per kilogram, how much will be his profit?
messages.content: A sack of rice, which is 50 kilograms,  costs $50. If David sells it for $1.20 per kilogram, how much will be his profit?
messages.role: user
messages.content: David's revenue for the 50 kilograms of rice is $1.20 x 50 = $<<1.20*50=60>>60.
  So, his profit is $60 - $50 = $<<60-50=10>>10.
  #### 10
messages.role: assistant