What is the total cost of buying 3 items priced at $15 each?

To determine the total cost of buying 3 items priced at $15 each, you simply multiply the price of one item by the number of items you are purchasing. In this case, you would perform the calculation as follows:

Total cost = Price of one item × Number of items

Total cost = $15 × 3

Calculating this, you get:

Total cost = $45

This amount represents the total expenditure for purchasing the three items, as you have three units of $15. Thus, the correct answer is that the total cost is $45.