22. A firm's weekly costs consist of $100 for rent, $20 for insurance, $20 for utilities and $60 for rental of its machines. Each worker it employs costs $100 a week. Complete the table below. Workers Output Marginal Product FixedCost VariableCost TotalCost Avg TotalCost MarginalCost 0 0 1 30 2 50 3 65 4 75 5 80 port that is also an implicit cost is