Contribution margin and margin of safety ratio Data on three departments of Tom Sharp Company are presented below:

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Revenue Fixed cost Variable cost. Activity... Design Production Delivery $42,000 $95,000 $21,000 $8,000 $15,000 $4,500 $5 per hour $6 per hour $.25 per mile 6,000 hours 11,875 units 70,000 miles REQUIRED For each department calculate the contribution margin, break-even volume, and margin of safety ratio.