Wilson Blossom is a leading producer of vinyl replacement windows. The company's growth strategy focuses on developing domestic markets in large metropolitan areas. The company operates a single manufacturing plant in Kansas City with an annual capacity of $500,000$ windows. Current production is budgeted at $450,000$ windows per year, a quantity that has been constant over the past three years. Based on the budget, the accounting department has calculated the following unit costs for the windows:

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