Malcolm helps his father carry boxes into the warehouse. He brings in 4 boxes that each contain 18 cell phones. He also brings in 3 boxes of headphones. There are 12 sets of headphones in each box.

Which number sentence can be used to find how many more cell phones Malcolm carried in than headphones?

A.
4 × (18 – 12) = p

B.
7 × (18 – 12) = p

C.
(4 × 18) – (3 × 12) = p

D.
(4 – 3) × (18 – 12) = p