conversations.from: human
conversations.value: Explain how to solve this math problem: Luca went to a sandwich shop for lunch. The sandwich he bought was normally $8, but he had a coupon for a quarter of the price off. He then upgraded it with sliced avocado for an extra dollar. After adding a drink and a $3 salad, his total lunch bill was $12. How many dollars did Luca pay for his drink?
conversations.from: assistant
conversations.value: Luca’s coupon saved him 8 / 4 = $2 on his sandwich.
  He paid $1 for avocado on his sandwich, so the sandwich cost 8 - 2 + 1 = $7.
  He paid $3 for his salad, so his meal without the drink was 7 + 3 = $10.
  Thus, Luca paid 12 - 10 = $2 for his drink.