Gabriel is at the grocery store, and wants to figure out his total cost before he gets to the register. He bought 2.5 pounds of apples that are x dollars a pound and 2 bags of lettuce for y dollars each. Gabriel remembers he has a coupon for $2 off his bill. Gabriel has $30 to pay for the groceries. What simplified expression would represent the amount of change he should receive?
A:2.5x + 2y + 28
B:28 – 2.5x – 2y
C:32 + 2.5x + 2y
D:32 – 2.5x – 2y