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a square light-switch plate is made which measures 4 inches on each side.
A square hole measuring 1 inch on each side is left in the center.
It will cost $2.75/square inch, what is the construction cost?
Find the amt of metal in the switch
Plate area - hole area = total metal area
4^2 - 1^2 = 15 sq/in of metal
2.75 * 15 = $41.25