14-66 Homeowner Henry is building a fireplace for is house. The fireplace will require 1000 bricks (a) If the cost of a Chimney Brick in 2007 was $2.10, calculate the material cost of Henry's project in 2017. The Chimney Brick Index (CBI) was 442 in 2007 and is expected to be 618 in 2017. (b) Estimate the material cost of a similar fireplace to be built in the year 2020. What assumption did you make