I am pretty sure it's Rupees 30K. You won't get $30K in US as an entry level banker (a teller actually makes that in a year, almost), forget Nepal.
Anyways, before you take the offer, do a good research on the bank. There banks and co-ops like mushroom in Nepal and many will fail before saturation happens. Rupees 30K a month is not a bad but is not that great either.