Areas of surplus, revenue, expenditure and deadweight loss under perfect competition versus monopoly

Activity I use with year 13 to learn about the impact of monopolies on allocative efficiency.

The answers:
Consumer surplus under perfect competition? (1+2+3)
Producer surplus under perfect competition? (4+5)
Total surplus under perfect competition? (1+2+3+4+5)
Consumer expenditure/Producer revenue under perfect competition? (4+5+6+7)

Consumer surplus under monopoly? (1)
Producer surplus under monopoly? (2+4+6)
Total surplus under monopoly? (1+2+4+6)
Consumer expenditure/Producer revenue under monopoly? (2+4+6)
Deadweight welfare loss under monopoly? (3+5)
Bonus Question: (6)

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