Question 8 2.5 pt Let's assume that a firm's total weekly costs are as follows: 1. Salaries = $5,000. 2. Supplies = $1,000. 3. Rent = $600. In addition, the owners have invested $30,000 of their own money into the business. This could have earned them interest of $100 per week if they had chosen to put it into a bank instead of investing it into their business. This firm's weekly explicit costs are: $6,600. $6,700. $36,600. $36,700. $6,800. Question 9