Samuel orders four dvds from an online music store. each dvd cost $9.99. he has a 20% discount code and sales tax is $6.75. what is the total cost of his order?

this is a review and i forgot what to do.

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

4th option is correct xy=-10

if this was to u plzz mark me the brainliest