Question: A rectangular box with an open top has a length of x feet, a width of y feet, and a height of z feet. It

A rectangular box with an open top has a length of x feet, a width of y feet, and a height of z feet. It costs $1.20 per square foot to build the base and $0.75 per square foot to build the sides. Write the cost C of constructing the box as a function of x, y, and z.

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