Question

Jovan needs to buy a package of ham for $5, a package of cheese for $3, and a loaf of bread for $4 to make lunch.

Answer 1

This is the expression before any coupon is applied
3 + 4 + 5

This is the expression if the bread and cheese coupons are applied, without applying total purchase coupon
(1−x)3+(1−y)4+5

This is the expression if only total purchase coupon is applied
(1−z)(3+4+5)

I think the answer is the one I bold (3+4+5)

Answer 2

If the only two options are as given, then I would select (1−x)3+(1−y)4+5 as the expression representing the price of the total discount is applied.