Lizzy: Mr. Grey is purchasing gifts for his family. So far he has purchased 3 polo shirts for $26 each; 2 necklaces for $83 each; and 1 computer game for $90. Since Mr. Grey purchased all those using his credit card, he received a $12 rebate. What is the total cost of the gifts after the rebate?.
Me: Hmmm, let me think. I think this is the detailed solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Mr. Grey paid $26 / shirt x 3 shirts = $78 on polo shirts. He paid $83 / necklace x 2 necklaces = $166 on necklaces. So, he paid $78 + $166 + $90 = $334 for the gifts. After the rebate, the total cost of the gifts is now $334 - $12 = $322. Final answer: 322.