A rectangular building with a square front is to be constructed of materials that costs 18 dollars per ft 2 for the flat roof, 15 dollars per ft? for the sides and the back, and 20 dollars per ft? for the glass front. We will ignore the bottom of the building. If the volume of the building is 5,600 ft³, what dimensions will minimize the cost of materials? (Round your answers to the nearest hundreth, and enter the dimensions in order from the smallest to the largest.)

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