Suppose that Glitter Gulch, a gold mining firm, increased its sales revenues on newly mined gold from $120 million to $240 million between one year and the next.  a. Assuming that the price of gold increased by 100 percent over the same period, by what percentage did Glitter Gulch’s real output change? _______ percent  b. If the price of gold had not changed, what would have been the change in value of Glitter Gulch’s real output? $________ million

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