Profit/loss calc at expiry if future price is less than cash price

What would be the profit/loss if one would have purchased reliance futures at 1271.10 and not sell the position at expiry date

Ref: http://nseindia.com/marketinfo/fo/fomwatchsymbol.jsp?key=RELIANCE
RELIANCE DEC FUTURE as on 28 Dec 2006
High Price:1303.50
Low Price: 1271.10 ( purchase price)
Last Price: 1274.60 ( last traded price on expiry)
Cash Price: 1284.95 ( Closing price in cash on expiry date)

I think the closing price of Reliance is 1274.7. On expiry day, the near month futures get settled at the underlying price. The lot size of Reliance is 300. So your profit would be 300*(1274.7-1271.1) = Rs. 1080 excluding brokerage, STT etc.

Thanks ivanboesky.. I appreciate your immediate reply to the query

In general, I understand the calculation now to be as
lot size * ( closing price in cash mkt - future purchase price)

That is the correct formula to be used on the expiry day.