Now you try one. We'll walk you through it, step by boring step.

Mechanic and Enthusiast entered into a contract under the terms of which Mechanic was to rebuild Enthusiast's engine for a price of $8,000. Mechanic rebuilt the engine, but Enthusiast refused to pay. The court needs to determine how much Mechanic is entitled to.

What is Mechanic's loss in value?

 
The cost of rebuilding the engine.
 
$8,000--the amount he was to receive under the contract but didn't get because of the breach.
 
The amount it would have cost Mechanic to rebuild the engine.