What will be the total cost of all the materials for the bookcase, including tax?

Question

You design and build furniture, and you have agreed to build a bookcase for a customer. Using a materials list, you determine that you need 4 boards 1 inch by 8 inches by 6 feet and 3 boards 1 inch by 6 inches by 4 feet. These boards are priced at $1.25 per board foot. In addition, you will need 3 packages of screws at $0.79 each and one can of varnish at $3.75. Sales tax is 6%. What will be the total cost of all the materials for the bookcase, including tax?

Answer 1

Calculate the total area of the boards needed (ignore the 1" depth) and use feet only (6" =1/2')

 

4 x 2/3 x 6 + 3 x 1/2 x 4 = 22 board feet

 

The boards will cost 22 x 1.25 = 27.50  add in the other items:

 

27.50 + 3 x 0.79 + 3.75 = 33.62  calculate the tax

 

33.62 x .06 = 2.02

 

Total cost 33.62 + 2.02 = 35.64