Late filing of itr and payment of tax due

Dear Sir,

In FY 2010-11, I worked for two organisations- one for 4 months and in the other for 2 months. If taken separately, the salary income from each organisation is not taxable. However, if taken together, it falls in the taxable bracket. I did not file return for AY 11-12 and also did not pay tax due.

I want to file the return now. My total income from both organisations, after deduction has been given as below. Please tell what would be the tax liability. Also do I need to pay any penalty or interest?

Thankful for help.