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11) Sue E.'s donut shop had a great year last year-$350,000 in sales revenue with a contribution margin of 25%, and a net margin of roughly 14.2857% ($50,000 in net income). Based on this financial data from last year, how much could Sue E.'s sales levels drop and her shop still breakeven? Round to the nearest percent, ignore income taxes, and rely on the shop's margin of safety ratio. a) 61% b) 59% c) 57% d) 52% e) 48%