Please help me with the solution of this problem

Problem $1$

Use the time and location indices presented in the notes to estimate the cost of a building that

contains $24,800-$sf of floor area. The building is to be constructed $3-$yr from now in City A$.$ The

cost of a similar type of building that contained $48,300-$sf was completed last year in City C for a

cost of $$1,100,500$