. the retail electric price variance is primarily due to : rate actions at entergy texas , including a base rate increase effective august 2010 and an additional increase beginning may 2011 ; a formula rate plan increase at entergy louisiana effective may 2011 ; and a base rate increase at entergy arkansas effective july 2010 . these were partially offset by formula rate plan decreases at entergy new orleans effective october 2010 and october 2011