GUWAHATI: Guwahati Tea Auction Centre (GTAC) has added another feather to its cap. This year in the Sale a25 in GTAC Auction average price of tea was increased by Rs.90.60 per kg compared to the last year’s Sale 25. This is a world record in any tea auction centre, according to Dinesh Bihani, secretary of Guwahati Tea Auction Buyers’ Association.