8. The cash flows received sooner is preferred to the same cash flows received lather. Thus, a dollar today worth more than the one dollar in the future. a. True b. False 9. John has a small business to sell used video games in the mall. Every month he has to pay $2000 to the mall as the rent. When John tries to calculate his monthly cost, the $2000 should count as a. Mixed cost b. Fixed cost c. Variable cost d. Opportunity cost 10. When calculate business operating costs, the costs that vary in direct proportion with the number of goods or service sold are called a. Mixed costs b. Fixed costs c. Variable costs d. Opportunity costs