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The Production Process and Costs. Short run Cost. Fixed costs: Costs that do not change with changes in output. Variable costs: Costs that change with changes in output. Average and Marginal Costs. AFC = (FC) / (Q) AVC = (TVC) / (Q) ATC = (TC)/(Q) MC = dTC/dQ.
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Short run Cost • Fixed costs: Costs that do not change with changes in output. • Variable costs: Costs that change with changes in output.
Average and Marginal Costs • AFC = (FC) / (Q) • AVC = (TVC) / (Q) • ATC = (TC)/(Q) • MC = dTC/dQ
Relations Among Costs • Figure 5-11 Page 180. The relationship among costs. • Figure 5-12 Page 183. The relationships among average and marginal costs. • TC = TFC + TVC • ATC = ATFC + ATVC
Algebraic Forms Of Cost Functions • TC(Q) = f + aQ + bQ2 + cQ3 a, b, c, f are constants f represents fixed costs TFC=? TVC=? MC=? ATFC=? ATVC=? ATC=?
Case 1. • TC = 20 + 3Q2 -Marginal cost of producing 10 units of output? -Average fixed cost of producing 10 units of output? -Average variable cost of producing 10 units of output? -Average total cost of producing 10 units of output?
Case 2. • No. 4 Page 195. TC = 50 + 25Q + 30Q2 + 5Q3 - The fixed cost of producing 10 units of output. - The variable cost of producing 10 units of output. - The total cost of producing 10 units of output. - The average fixed cost of producing 10 units of output. - The average variable cost of producing 10 units of output. - The average total cost of producing 10 units of output. - The marginal cost of producing 10 units of output.
Case 3. • No. 6 Page 195 Fixed cost? Variable cost? Total cost? Average fixed cost? Average variable cost? Marginal cost?