Mumbai, Dec. 1 -- The Indian rupee is staying almost flat in tight trades in opening trades on Monday despite weakness in greenback overseas and positive cues from equities. Sharply rising international oil prices are weighing on the local unit. INR opened at Rs 89.45 per dollar and hit a high and low of 89.44 an 89.46 respectively so far during the day. On Friday, rupee dropped 7 paise to settle at 89.43 against the US dollar, tracking a strong greenback and a rise in crude oil prices in the international market. Besides, subdued equity market sentiment and the withdrawal of foreign funds, weighed on the local unit. Local shares gave up early gains to end marginally lower on Friday as traders took profits in key sectors after recent gain...