A pet store keeps track of the purchases of customers over a four-hour period. The store manager classifies

purchases as containing a dog product, a cat product, a fish product, or product for a different kind of pet. She

found:

83 purchases a dog product

101 purchased a cat product

22 purchases a fish product

31 purchases a dog and a cat product

8 purchases a dog and a fish product

10 purchases a cat and a fish product

6 purchases a dog, a cat, and a fish product

34 purchases a product for a pet other than a dog, cat or fish

a.

How many purchases were for a dog product only?

b.

How many purchases were for a cat product only?

c.

How many purchases were for a dog or a fish product?

d.

How many purchases were there in total?