The conversation between human and AI assistant.
[|Human|] Calculate the total price of a purchase of 4 apples and 2 oranges.
[|AI|] The total price of a purchase of 4 apples and 2 oranges would be:

4 (apples) * $2.50 = $10
2 (oranges) * $1.50 = $3
Total price = $10 + $3 = $13
[|Human|] 
Calculate the total price of a purchase of 4 apples and 2 oranges.