A trader purchased a machine on 1 January 2015. He charged depreciation on it at $10\%$ per annum by the straight-line method, and he disposed of it on 1 January 2017 for $\$4000$. The profit on disposal was $\$200$. What was the machine's cost on 1 January 2015?
- A$\$4560$
- B$\$4750$
- C$\$5040$
- D$\$5250$