Afurniture builder who has been commissioned to custom build some bookcases. he goes and measures the space but only had a meter stick with him. finds that the length is 2 meters, the height is 4 meters and the depth is 50 centimeters.

you are to build the shell of the bookcases. you can only buy lumber in 1 inch by 12 inches by 8 feet though. if each plank costs $18.00 how much will the materials cost the customer?
a) $144.00
b) $198.00
c) $702.00
d) $720.00