7 (1 point) A firm's opportunity cost of production is the sum of the cost of using resources Question 7 options: bought in the market bought in the market, owned by the firm, and supplied by the firm's owner owned by the firm Question 8 (1 point) Which one of the following is included in the implicit rental rate of capital? Question 8 options: the cost of raw materials the cost of electricity economic depreciation Question 9 (1 point) Real income is calculated as Question 9 options: income divided by the price of a good income before taxes income divided by the quantity consumed of a good Question 10 (1 point) The budget line depends on Question 10 options: income and prices prices only income only