Whoa.....thats a dollar bill with a serial number ends with F....that means its the ethiopian mint edition. If you hold it in the sunlight at precisely 12:03pm on the 5th wednesday of the 10000th leap year (gregorian calendar of course). It should cast a shadow on the ground that resembles "whistler's mother". If so... Id say its worth at least 7 Rupees. Il give you 1 first class USPS stamp for it!