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The two trianglular faces we see have area

(1/2)(18)(14.1) and (1/2)(10)(16)

There's two more like these we can't see.

And the base has area

(18)(10)

for a total area of

A = (18)(10) + 2 ( (1/2)(18)(14.1) + (1/2)(10)(16))

A = 593.8

second choice

40% off the regular price is the correct answer.

step-by-step explanation: