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Urban Inc. sells specialty equipment for mountain climbers. Its sales for last year included $455000 of tents and $900,000 of climbing gear. For next year, management has decided to sell specialty sleeping bags also. As a result of this change, sales projections for next year are $550000 of tents, $990,000 of climbing gear, and $180,000 of sleeping bags. How much of next year's sales are derived from the side effects of adding the new product to its sales offerings