D 10 2 26 If we know the marginal cost of production is currently $2 then we know variable costs of production must be zero. O total costs of production must be decreasing. average total costs of production must be increasing. nothing about the fixed costs of production. D 10 2 27 If the quantity of production decreases by 10 units and total costs decrease by $20 then we know that marginal cost is O -$20 O -$2 O $2 $20 D 10] $2 28 If the total cost of producing 10 units Is $1000 then we know the marginal cost is $100 and the average total cost is $100. the marginal cost is unknown and the average total cost is $100. the marginal cost is $100 and the average total cost is unknown. O the marginal cost is unknown and the average total cost is unknown. D 10] R 29 As the quantity of production increases we know that O average fixed costs will decrease and average total costs will increase. O average fixed costs will increase and average total costs will decrease. average fixed costs will decrease and average total costs may or may not increase. average fixed costs and average total costs may or may not decrease. [a] R2 30 15 If we know the marginal cost of Product X is $5 and Product X units increased by 100 then it must be total costs are $500. total costs increased by $20. total costs increased by $500. we cannot say anything about total cost at all