Strong growth AGL online 25 AGL Energy Limited 2011 Annual Report AGL Energy Online allows  customers to manage their  own energy account in a  secure, convenient and  easy online portal, which is  available all day, every day. Retail Energy Operating EBIT  increased by 17%, with strong  growth in dual fuel customers  and new electricity customers  in New South Wales. Retail Energy 2011 2010 Operating EBIT ($m) 373.0 318.7 Operating EBITDA ($m) 416.8 360.2 Operating cost/gross margin 46.5% 49.5% Electricity volume (GWh) 32,764 34,362 Gas volume (PJ) 216.2 210.9 Mass market gross margin ($m) 595.8 533.3 Average mass market customers (‘000s) 3,254.2 3,205.6 Average mass market gross margin per customer ($) 183.08 166.35