The table presents some details for a computer engineer in 2015. salary amount: $40000$ consultancy fees earned: $15000$ credit card repayment: $5000$ Income tax is fixed at $20\%$. The engineer put aside $10\%$ of the disposable income. What amount was saved?
- A$3200$
- B$4000$
- C$4400$
- D$5500$