The answer is 91 ............
Step-by-step explanation:
Discount amount = discount%of marked price
= 20% of 250
= 20/100x250
=Rs 50
1 Gallon is equal to 4 Quarts.

Quarts is equal to 10 Cups.

There are 7 Cups left.
7 Cups is equal to 56 Fluid Ounces.
Therefore, the answer is B.