A company's most recent results indicate that annual sales of 2,000 units earned total contribution margin of £50,000, and profits totalling £20,000.

Assuming the company remained within its relevant range, and if it had sold 2,400 units (with all other variables in the variable costing model being unchanged), what would have been its reported profit?

A) £10,000

B) £20,000

C) £30,000

D) £40,000