Answer:
Average price, excluding taxes, for each CD is <u>10.20</u>.
Step-by-step explanation:
Given:
Cost of first 5 CDs, 
Cost of each additional CD = 15.00
Now, cost of 10 additional CDs is the product of cost of one CD and total number of additional CDs. Therefore,
Cost of 10 additional CDs is, 
Now, total CDs purchased by Jana are, 
Total cost of the 15 CDs purchased is given as:

Now, average price, excluding taxes, for each CD is given as:

Therefore, the average price, excluding taxes, for each CD is 10.20.