Please provide a detailed step by step answer, I am very slow and easily confused. I need to make detailed notes that can be applied to similar problems.

A rectangular box is to have a square base and a volume of 10 ft3. y The material for the base costs 21 cents/ft2, the material for the top costs 12 cents/ft2, and the material for the sides costs 20 cents/ft2. If x denotes the length of one side of the base (in feet), find a function in the variable x giving the total cost of materials used in constructing the box in cents. Total Cost, as a function of X = X Determine the domain of the total cost function. Enter your answer using interval notation. Domain of total cost function =