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Judy hires students to sell magazine subscriptions at $300 per student per week. She leases equipment that costs $600 per week. The table gives Judy's total product schedule. Suppose Judy sells 23 subscriptions a week. Calculate her total cost, average total cost, and marginal cost The cost is $ a week when Judy sells 23 subscriptions a week. When Judy sells 23 subscriptions a week, average total coat is $ a house When Judy sells 23 subscriptions a week, marginal cost is