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15) Use a combined cost index and the power-sizing cost estimating model to estimate the current cost of a piece of equipment that has 50% more capacity than a similar piece of equipment that cost $30,000 five years ago. The appropriate power-sizing exponent for this type of equipment is 0.8 , and the ratio of the cost indexes (current to 5 years ago) is 1.24 . At a learning curve rate of 80%, estimate the time in minutes required to assemble production unit number 100 given that the first production unit required 74.8 minutes to assemble