15. Each day, a grocery store sells 112 gallons of milk for $2.10 per gallon. The owner of the grocery store has determined that for each $0.03 increase in the price per gallon of milk, the number of gallons sold will decrease by 2. If x represents the number of $0.03 increases in the price of a gallon of milk, which of the following expressions represents the daily amount of money, in dollars, the grocery store will collect from the sale of milk?