Answer:
$263.50
Explanation:
First step, discount the 50% that's on the whole store. You do this by multiplying the original price by the discount then subtracting that from the original price.
Then we take that additional 15% by doing the same exact thing but with 15% instead of 50%.
That's the total with all the discounts $263.50
If there is something about the explanation that isn't clear or you don't understand then let me know, I can try to explain it better