From the following particulars, calculate the amount of income to be credited to profit and loss account for the year ended $31$st March $2012$.
| $31-3-2011$ | $31-3-2012$ | |
|---|---|---|
| Outstanding Income | $1,500$ | $1,200$ |
| Income received in advance | $900$ | $540$ |
A sum of Rs. $14,670$ was received as income during the year ended $31$st March $2012$.