Practice exercise

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Humber College *

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Economics

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Feb 20, 2024

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1 Practice exercise: Ch. 8 Q1 Anderson and William run a small pottery firm. They hire one assistant at $12000 per year. They also pay annual rent of $5000 for their shop and spend $20000 per year on the materials. They have their own funds invested in pottery equipment that could earn them $4000 interest per year if alternatively invested. They have been offered $15000 per year to work as a potter for a competitor. They estimate that their entrepreneurial talents are worth $3500 per year. Their total annual revenue from pottery sales is $75000. Calculate the accounting cost, implicit costs, economic costs, accounting profits and economic profits for Anderson and William’s pottery firm. Accounting cost or explicit costs = 37,000 Implicit or imputed costs = 22,500 Economic costs = 59,500 Accounting profits = 38,000 Economic profits = 15500 **Accounting profits = Total revenue - Explicit costs **Economic profits = Total revenue – Economic costs
2 Formulas of Short period costs Total cost {TC} = TFC + TVC Average Fixed Cost {AFC} = Total ¿ Cost ¿ Quantityof output = TFC Q Average Variable Cost {AVC} = TotalVariableCost Quantity of output = TVC Q Average Cost {AC} = TotalCost Quantityof output = TFC + TVC Q OR Average Cost {AC} = TFC Q + TVC Q = AFC +AVC Marginal Cost {MC} = Change Total Cost Change output = ΔTC ΔQ Q2 Complete the following cost sheet of a firm. Given TFC = $12 mil. (All costs are in $mil.)
3 Output (Q) TVC TFC TC= TFC+TVC AFC= TFC÷Q AVC= TVC÷Q AC= AFC+AVC MC ∆TC ∆Q 0 0 12 12 ______ _______ _______ ________ 1 6 12 18 12 6 18 6 2 8 12 20 6 4 10 2 3 9 12 21 4 3 7 1 4 10 12 22 3 2.5 Q3 A textbook publisher finds that at an output of 10000 books, its AFC (per book) is $5. What is the TFC? The TFC is 50000 Q4 Suppose you are the owner of All Time Pizza store. You find that AVC is $10 and TVC is $20000. Find the quantity of Pizzas at your store. The quantity of pizzas at my store 2000 Q5 Jimmy and Laurie are the business partners who have opened a restaurant in Mississauga. They provide lunch and dinner in a sealed box. They are paying $18000 rent for their unit. Their total variable cost is $6000. Average cost is estimated as $6. Find the quantity of their boxes which they provide for lunch and dinner. 24000 (18000+6000) the quantity is 4000 boxes Q6 What are the features of Long period?
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4 The features of long period is Use the following table to answer questions 7 to 9 Labour units Total product Average product Marginal product 0 0 ----------- ----------- 1 2 2 6 3 12 4 16 5 18 6 18 7 16 Q7 The marginal product of the 3 rd unit of labour is: A. 4 B. 6 C. 8 D. 2 Q8 When the firm hires 5 units of labour , the average product of labour is: A. 5 B. 3 C. 4 D. 3.6 Q9 Negative marginal returns set in with the addition of the: A. 1 st unit of labour C. 2 nd unit of labour B. 7 th unit of labour D. 4 th unit of labour
5 Q10 Which of the figures correctly depicts a firm which does not experience diseconomies of scale? A) graph A B) graph B C) graph C D) graph D Q11 In the given diagram, curves 1, 2, and 3 represent the: A) Average, marginal, and total product curves respectively. B) Marginal, average, and total product curves respectively. C) Total, average, and marginal product curves respectively. D) Total, marginal, and average product curves respectively. Q12 Total cost of producing 100 units of a product is $1200 and the MC of 101th units is $315. What will be the AC in this scenario? Q TC MC AC