Service tax late payment, delayed by 60 days kindly help.

We are delyed by 60 days in depositing ST. so we have calcluated it as 5000*18% divided by 365 * 60 =145/-INR

plz help e-challan form is asking for ST interest amount, Primary Edu Cess interest amount, Sec Edu Cess amount kindly help how to fill this details..

also wanted to know do we need to pay 2% of the service tax as penalty at the time of deposit.

Thanks for your guidance.

Regards

Bob