Suppose a firm in a competitive market earned $1,000 in total revenue and had a marginal revenue of $10 for the last unit produced and sold. What is the average revenue per unit, and how many units were sold? $10 and 50 units $5 and 100 units $5 and 50 units $10 and 100 unitsAn example of an explicit cost of production would be the value of the time the business could've spent producing something else. lost opportunity to invest in capital markets when the money is invested in one's business. cost of forgone labor earnings for an entrepreneur. lease payments for the land on which a firm's factory stands