a. i. Table 1 below represents the output levels of a firm producing hand sanitizer.

ECONOMICS
WAEC 2023

a.

i. Table 1 below represents the output levels of a firm producing hand sanitizer. Use the information to answer the questions that follow.

Table 1

Output (units) 0 10 18 28 36 45

If the cost function of the firm is given as C = 30 + 4q, where C is the total cost and q is the units produced, calculate the:

total cost in dollars of producing:

18 units

ii.Table 1 below represents the output levels of a firm producing hand sanitizer. Use the information to answer the questions that follow.

Table 1

Output (units) 0 10 18 28 36 45

If the cost function of the firm is given as C = 30 + 4q, where C is the total cost and q is the units produced, calculate the:

total cost in dollars of producing:

36 units

b.

i. Average costs in dollars of producing:

28 units

ii. Average costs in dollars of producing:

45 units

c. What is the marginal cost in dollars of producing 28 units?

d. Determine the profit made from producing 45 units when the market price is fixed at $5.00 per unit.

e. Determine the fixed cost of the firm. Explain your answer.

Explanation

ai.

C = 30 + 4q

when q = 18units

C = 30 + 4(18)

= 30 + 72

= 102 dollars

aii.

C = 30 + 4q

when q = 36 units

C = 30 + 4(36)

= 30 + 144

= 174 dollars

bi.

At 28 units

Average cost = \(\frac{Total Cost}{Quantity}\)

NOTE: TC = C = 30 + 4q

Therefore, AC =\(\frac{30+4q}{q}\)

= \(\frac{30+4(28)}{q}\)

=\(\frac{142}{28}\)

= 5.07 dollars

bii.

At 45 units

Average cost = \(\frac{Total Cost}{Quantity}\)

NOTE: TC = C = 30 + 4q

Therefore, AC =\(\frac{30+4q}{q}\)

= \(\frac{30+4(45)}{45}\)

=\(\frac{210}{45}\)

= 4.66 dollars

c.

Marginal cost at 28 units produced = Total cost at 28 units - Total cost at 18 units

=\(\frac{30+4(28)-30+4(18)}{28-18}\)

= \(\frac{142-102}{10}\)

= $4.00

d.

Profit (π) = Total sales at 45 units - Total cost at 45 units

= ($5 x 45) - ( 30 + 4(45))

= 225 - 210

= $15.00

e.

Fixed cost is zero. Fixed cost is a cost that does not change, i.e when q = 0 then C = 30 +4(0)

= C = 30 + 4(0)

= 30 + 0

= $30



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