he president of a small manufacturing firm is concerned about the continual growth in manufacturing costs in the ast several years. The data series of the cost per unit for the firm's leading product over the past eight years is as pllows: Year Cost/Unit ($) Year Cost/Unit ($) 24.00 29.10 2 28.50 32.00 32.80 7 33.40 4 30.40 8. 39.40

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