[Question]: There was a big sale on cat food at the pet store. 20 people bought cat food that day. The first 8 customers bought 3 cases each. The next four customers bought 2 cases each. The last 8 customers of the day only bought 1 case each. How many cases of cat food were sold?
[Answer]: The first 8 customers bought 8 * 3 = 24 cases. The next 4 customers bought 4 * 2 = 8 cases. The last 8 customers bought 8 * 1 = 8. In total 24 + 8 + 8 = 40 cases were sold.
So the answer is 40.

[Question]: Tom turned 32 years old 5 years ago. 7 years ago Jim was 5 years older than half Tom's age. How old is Jim in 2 years?
[Answer]: Tom is 32 + 5 = 37 years old. So 7 years ago he was 37 - 7 = 30 years old. Half of his age was 30 / 2 = 15 years old. So 7 years ago Jim was 15 + 5 = 20. So he is now 20 + 7 = 27 years old. That means in 2 years he will be 27 + 2 = 29 years old.
So the answer is 29.

[Question]: Carly is a pet groomer. Today, her task was trimming the four nails on dogs’ paws. She trimmed 164 nails, but three of the dogs had only three legs. How many dogs did Carly work on?
[Answer]:

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.
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Let N be the number of dogs with 4 legs Carly worked on. All the dogs with 4 legs had 4N paws. There were 3 * 3 = 9 paws on dogs with 3 legs. At 4 nails per paw, she trimmed 164 / 4 = 41 paws. She worked on 4N + 9 = 41 paws. Thus, she worked on 4N = 32 paws on dogs with 4 legs. She worked on N = 32 / 4 = 8 dogs with 4 legs. Thus, Carly worked on 8 + 3 = 11 dogs.
So the answer is 11.