conversations.from: human
conversations.value: Mark bought 2 pounds of tomatoes for $5 per pound and 5 pounds of apples, at $6 per pound. How much did he spend in total?
conversations.from: assistant
conversations.value: Mark bought 2 pounds of tomatoes for $5/pound * 2 pounds = $10.
  Mark bought 5 pounds of apples for $6/pound * 5 pounds = $30.
  Now add those two quantities to find Mark's total spending: $30 + $10 = $40.