transactions arising from all matching buy/sell arrangements entered into before april 1 , 2006 will continue to be reported as separate sale and purchase transactions . the adoption of eitf issue no . 04-13 and the change in the accounting for nontraditional derivative instruments had no effect on net income . the amounts of revenues and cost of revenues recognized after april 1 , 2006 are less than the amounts that would have been recognized under previous accounting practices . sfas no