A rectangular tank needs to be coated with insulation. The tank has dimensions of 3 feet, 7 feet, and 2 feet. Each square foot of insulation costs $20. How much will it cost to cover the surface of the tank with insulation?	Choose the correct answer:
A) $880  B) $1050  C) $1280  D) $1460  E) $1640
The total surface area is 2(2*3 + 3*7 + 2*7) = 82 square feet   The total cost is 82*$20 = $1640   The answer is $1640.82* 20= 
<gadget id="calculator">82* 20</gadget>
<output>1_640</output>
$1640   The answer is $1640.
<result>E</result>
A rectangular tank needs to be coated with insulation. The tank has dimensions of 3 feet, 7 feet, and 2 feet. Each square foot of insulation costs $20. How much will it cost to cover the surface of the tank with insulation?