A mechanic builds an engine and then sells it to a customized body shop for $7000. The body shop installs the engine in a car and resells it to a...

A mechanic builds an engine and then sells it to a customized body shop for $7000. The body shop installs the engine in a car and resells it to a dealer for $20000. The dealer then sells the finished vehicle for $35000. A customer drives off with the car. By how much does GDP increase? What is the value added at each stage of the production process? How does the total value added compare with the amount by which GDP?