HHC Software Company mainly manufactures and markets single computer game software. The following is the relevant information about HHC Company in 2020 and 2021:

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Software Company mainly manufactures and markets a single computer game software. The following is the relevant information about Company in 2020 and 2021 : 2020 $60 2021 $70 Price per unit Manufacturing cost per unit: direct material Direct labor variable manufacturing overhead Fixed manufacturing cost per year $12 $5 $3 $60,000 $12 $5 $3 $60,000 $4 $4 $20,000 $20,000 Selling and Administrative Expenses: Variable selling and administrative expenses per unit Annual fixed selling and administrative expenses Budget production Beginning Inventory production quantity Sales volume Closing inventory 5,000 1,000 5,000 0 5,000 4,000 1,000 3,000 3,500 500 Require: 1. Assuming the company uses variable costing, it calculates manufacturing costs per budgeted unit and prepares income statements for 2020 and 2021. (5 points) 2. Suppose the company uses absorption costing, calculates the manufacturing cost per budgeted unit and prepares the income statement for 2020 and 2021. (10 points) 3. The general manager of the company does not understand why the operating income calculated by the two methods is different. Try to explain the difference between the two methods to the general manager and explain the reasons for the difference in earnings in 2020 and 2021. (7 points)