Your boss is the director of reporting for the Athens County Construction  Agency (ACCA). It has been his job to track the cost of construction in Athens County. Twentyfive years ago, he created the ACCA Cost Index to track those costs. Costs during the first year of  the index were $14 per square foot of constructed space (the index value was set at 100 for that  first year). This year a survey of contractors revealed that costs were $70 per square foot.  (a) What index number will your boss publish in his report for this year?  (b) If the index value was 500 last year, what was the cost per square foot last year?

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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Your boss is the director of reporting for the Athens County Construction 
Agency (ACCA). It has been his job to track the cost of construction in Athens County. Twentyfive years ago, he created the ACCA Cost Index to track those costs. Costs during the first year of 
the index were $14 per square foot of constructed space (the index value was set at 100 for that 
first year). This year a survey of contractors revealed that costs were $70 per square foot. 
(a) What index number will your boss publish in his report for this year? 
(b) If the index value was 500 last year, what was the cost per square foot last year?  

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