Lauren H. answered 08/10/18
Tutor
4.8
(24)
Experienced High School Chemistry Teacher
I assume you mean "each" rather than "eat"? I assume the price you list, 2.79 is the 10% off price?
If above true, then, 5 x 2.79 = 13.95
13.95 X 1.07 = 14.93 Total cost with the tax.
If the price of 2.79 was a 10% discount, then it is 90% of the non-sale price:
.90 x = 2.79
x = 3.10
So if you bought 5 at 3.10, that would be 15.50.
15.50 x 1.07 = 16.59 That's what you would have paid.
The difference is 16.59 - 14.93 = 1.66 savings.