US dollar drops further against rupee

The US dollar dropped further against the rupee at 66.50/51 per dollar but the pound sterling finished higher at Rs 96.15/17 per pound at the close of the Interbank Foreign Exchange market today.
Following are the Interbank Forex and RBI rates:
(In Rs Per Unit)
Unit Interbank RBI Reference US Dollar 66.50/51 US Dollar Rs.66.6088 Pound Sterling 96.15/17 Euro Rs.75.3012 Euro 75.01/03
Japanese Yen(100) 59.