The marginal revenue is $0.5 which is being earned if the company sells one more pencil.
Total revenue is the amount being obtained by the firm after selling the goods and services in the market.
Given values:
Quantity sold: 10,000 units
Marginal quantity: 10,001 units
Equilibrium price: $0.50
Computation of marginal revenue earned:
[tex]\rm\ Marginal \rm\ revenue=\frac{ \rm\ Additional \rm\ revenue-\rm\ Total \rm\ revenue}{\rm\ Total \rm\ quanitiy - \rm\ Additional \rm\ quantity} \\\rm\ Marginal \rm\ revenue=\frac{ 10,001 \times\ \$0.50 - 10,000 \times\ \$0.50}{10,001-10,000} \\\rm\ Marginal \rm\ revenue=\frac{\$5,000.50-\$5,000}{1} \\\rm\ Marginal \rm\ revenue=\$0.50[/tex]
Therefore, when the company sells one more pencil then it earned a marginal revenue of $0.50.
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