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A rug company weaves rugs that are made by repeating the design in Figure 12.56 . Lengths of portions of the design are indicated in the figure. The yarn for the shaded portion of the design costs $5 per square unit, and the yarn for the unshaded portion of the design costs $3 per square unit. How much will the yarn for a 60-unit-by-84-unit rug cost? Explain your reasoning.
Figure 12.56 A design for rugs.
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