John buys a gaming PC for $1200. He decides to replace the video card in it. He sells the old card for $300 and buys a new one for $500. How much money did he spend on his computer, counting the savings from selling the old card? Give the rationale and then the answer.
Let's think step by step. He spent an extra 500 - 300 = $200 on the video card. That means the total cost was 1200 + 200 = $1400.. The answer is: 1400.

It's Yvette's turn to treat herself and her three best friends to a round of ice cream sundaes. Alicia orders the peanut butter sundae for $7.50. Brant orders the Royal banana split sundae for $10.00. Josh orders the death by chocolate sundae for $8.50 and Yvette orders the cherry jubilee sundae for $9.00. She leaves her waiter a 20% tip. How much will her final bill be? Give the rationale and then the answer.
Let's think step by step. Yvette spent 7.50 + 10 + 8.5 + 9 = $35.00 on ice cream sundaes. Her bill comes to $35.00 and she leaves a 20% tip for the waiter so that's 35 * .20 = $7.00. The bill was $35.00 and she added a $7.00 tip for a total of 35 + 7 = $42.00.. The answer is: 42.

Jessica is making an apple pie. She knows that each serving requires 1.5 apples and she has 12 quests. She plans to make 3 pies, which each contain 8 servings. If her guests finish all the pie, on average , how many apples does each guest eat? Give the rationale and then the answer.
Let's think step by step. She is making 24 servings because 3 x 8 = 24. Each guest has 2 servings because 24 / 12 = 2. Each guest has 3 apples because 2 x 1.5 = 3.. The answer is: 3.