conversations.from: human
conversations.value: Can you guide me through solving this problem: Scott wants to buy a skateboard. To make money, Scott sold berry smoothies for $3 a cup and cakes for $2 each. He sold 40 cups of smoothies and 18 cakes. How much money did he make?
conversations.from: assistant
conversations.value: He made $3/cup × 40 cups = $120 from the smoothies.
  He also made $2/cake × 18 cakes = $36 from the cakes.
  Scott made a total of $120 + $36 = $156.