Mike has spent $5000 purchasing and repairing an old fishing boat, which he plans to sell as it is now for $3000. He discovers that he needs an additional repair, which will cost $4000. How should he proceed?

A) Sell the boat as it is for $3000
B) Repair the boat for $4000 and then sell it
C) Sell the boat as it is for $2000
D) Repair the boat for $4000 and keep it