The Sensex and Nifty erased early losses and ended higher on Friday as some consumer goods firms expected to benefit from the launch of a unified goods and services tax gained, offsetting declines in sectors such as autos that would be hit.But the indexes still posted their first monthly loss this year as a record-setting rally cooled.NSE index closed up 16.8 points or 0.18 per cent at 9,520.90. BSE index ended 64.09 points or 0.21 per cent higher