Answer:
$7.
Explanation:
We know that HOT PIZZA offers 20% discount.
Now, Ali payed $5.60 with the discount included, this means that Ali only payed a 80% of the original price, that is, $5.60 represents 80% of x, where x represents the original price. So, we can elaborate the following relation

Which means that 80% of the original price is $5.60. Then, we solve for


Therefore, the original price is $7.