The town is looking to expand a rectangular playing field that was 60 ft by 80 ft. They want to increase the total area of the field by 3200 sq ft by adding the same amount to both the length and width of the field. Which equation can be used to determine how much should be added to the length and width of the field?
A
(x)(x) = 3200

B
(x)(x) = (60)(80) + 3200

C
(60 + x)(80 + x) = 3200

D
(60 + x)(80 + x) = (60)(80) + 3200