9. How much would it cost to construct a building today that cost $128,000 to build back in 1970 iven the burlding construction index for constructing that type of building was 287 in 1970 and is now 20272 Solution Cost of constructing the building today = (1970 price / 1970 index)* Index today Cost of construction today = (128000/28.7)(202.7) Cost of construction today = $904,027.87.