conversations.from: human
conversations.value: I need help with this problem:
  Toby is dining out with his friend. They each order a cheeseburger for $3.65. He gets a milkshake for $2 and his friend gets a coke for $1. They split a large fries that cost $4. His friend also gets three cookies that cost $.5 each. The tax is $.2. They agree to split the bill. If Toby arrived with $15, how much change is he bringing home?
conversations.from: assistant
conversations.value: The cookies cost 3 x .5 = 1.5
  The hamburgers cost $7.3 because 2 x 3.65 = 7.3
  The total cost is $16 because 7.3 + 2 + 1 + 4 + 1.5 + .2 = 16
  The cost is $8 per person because 16 / 2 = 8
  Toby has $7 in change because 15 - 8 = 7