The conversation between human and AI assistant.
[|Human|] Calculate the total cost for 10 boxes of apples at $2 a box.
[|AI|] Sure! If each box of apples costs $2 and you want to purchase 10 boxes, the total cost would be $2 * 10 = $20.
[|Human|] 
Calculate the total cost for 10 boxes of apples at $2 a box.