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Colby Company makes cases for cell phones of all sizes and types for sale through specialty retailers. The company makes a standard model for the most recent iPhone as well as a deluxe model. Management has designed an ABC system with the following activity cost pools and activity rates for these models: Management would like an analysis of the profitability of a particular customer, Cell City, which has ordered the following products over the last 12 months: The company's direct labour rate is $28 per hour. Required: Using the company's ABC system, compute the customer margin of Cell City