A store sells three different styles of fleece jacket in a different color is it style can also be purchased with or without it but how many different versions of fleece jacket does the stores sell

The store can sell 18 different versions of fleece jacket.

Step-by-step explanation:

The store offers 3 different styles of fleece jackets to its customers. There are 6 different colors available for each style of fleece jacket. The customers can choose from 18 versions of fleece jackets. These jackets can be purchased from the stores by the customers.