Laura wants to bake a cake for her mother. She checks the recipe and the pantry and sees that she needs to buy 2 cups of flour, 2 cups of sugar, a cup of butter, and two eggs. The flour costs $4. The sugar costs $2. The eggs cost $.5, and the butter costs $2.5. When she is done baking it, she cuts the cake into 6 slices. Her mother enjoys a piece the first two days. But on the third day, they discover that Kevin, her dog, ate the rest of the cake. How much did the amount the dog ate cost? Give the rationale and then the answer.
Let's think step by step. The cake cost $9 in total because 4 + 2 + .5 + 2.5 = 9. Each slice costs $1.5 because 9 / 6 = 1.5. The dog ate 4 slices because 6 - 2 = 4. The amount the dog ate cost $6 because 4 x 1.5 = 6.. The answer is: 6.

Sid takes $48 with him on a shopping trip to the mall. He spent some of his money on computer accessories and another $8 on snacks. After these purchases, he only has $4 more than half of his original money left. How much did he spend on computer accessories? Give the rationale and then the answer.
Let's think step by step. Half of Sid's original money is $48 / 2 = $24. Sid has only $24 + $4 = $28 left after his purchases. He had $28 + $8 = $36 before he spent $8 on snacks. So, Sid spent $48 - $36 = $12 on computer accessories.. The answer is: 12.

Adam had a farm with animals. He had 12 cows and twice as many sheep. He decided to buy 3 pigs for every sheep he had. How many animals were on the farm after the transaction? Give the rationale and then the answer.
Let's think step by step. Adam had twice as many sheep as the cows, so 2 sheep / cow * 12 cows = 24 sheep. For every sheep, he bought 3 pigs, so he bought 3 pigs / sheep * 24 sheep = 72 pigs. In total on the farm, there were 72 pigs + 24 sheep + 12 cows = 108 animals.. The answer is: 108.