Alex gives up his job earning $4000 a month job as a manager of a repair shop, to open his own business repairing motorcycles. He takes $6000 out of his own savings to buy basic equipment. He also takes a loan from the bank for some large machinery which he needs to purchase, of which he now needs to make monthly payments of $3000. He also has a lease in which he pays $2000 a month for rent on his shop. He buys parts as needed, and this month those parts cost him $1000. This month he repaired 30 motorcycles at $500 per bike. Answer the following questions for Alex's business for this month: 1. How much are his sunk costs? 2. How much did are his fixed costs? 3. How much are his variable costs? 4. How much are his explicit costs? 5. How much are his implicit costs? 6. How much is his total revenue? 7. How much is his accounting profit? 8. How much is his economic profit