conversations.from: human
conversations.value: A crate can hold 20 kilograms of tomatoes. Tommy has 3 crates which he bought for $330. He wants to sell the tomatoes for $6 per 1 kilogram but 3 kilograms of tomatoes were rotten. How much will be Tommy's profit from selling those tomatoes?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: Tommy has a total of 20 x 3 = 60 kilograms of tomatoes.
  Only 60 - 3 = 57 kilograms can be sold.
  His earnings for the tomatoes will be $342.
  Thus, his profit will be $342 - $330 = $12.