Task: Question Answering
Input (English): Context: Grabbed one gallon and wondered what the price would be . The shelf read " two gallons for $ 6.50 " and in fine print " one gallon at regular price " with no indication what regular price was . After waiting in a five minute line I finally learned that " regular price " is $ 4.00 so I left . We did n't need milk that 's as expensive as gas . 
Question: Why do I want to buy two gallons instead of one ?
Output (English): I want to save some money .