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12. Unlike in Problem 11, the Finch Convenience Store uses different markups for its range of different products, resulting in the following contribution margin ratios per product category. Beverages have a contribution margin ratio of 75%, non-perishable food 50%, hardware 40%, and magazines 30%. The usual sales mix as a percentage of sales is 40% beverages, 30% non-perishable food, 10% hardware, and 20% magazines. Fixed costs are $8,250 per month. Required Calculate the following: (a) The weighted average contribution ratio (b) The monthly break-even sales revenue for the convenience store (c) The sales revenue for beverages, non-perishable food, hardware, and magazines to achieve break-even sale (d) The sales revenue needed to make an operating profit of $2,750 per months for the convenience store 423 Behaviour and Break-Even Analysis (e) The sales revenue needed for beverages, non-perishable food, hardware, and magazines to achieve the operating profit of $2,750