A grocery shop is owned by Mr. Moore and has the following statement of revenues and costs:
Revenues ................................... $250,000
Supplies .................................... $ 25,000
Electricity .................................. $ 6,000
Employee salaries ........................ $ 75,000
Mr. Moore's salary ....................... $ 80,000
Mr. Moore always has the option of closing down his shop and renting out the land for $100,000. Also, Mr. Moore himself has job offers at a local supermarket at a salary of $95,000 and at a nearby restaurant at $65,000. He can only work one job, though. What are the shop's accounting costs? What are Mr. Moore's economic costs? Should Mr. Moore shut down his shop?