I am trying to help a neigbour's daughter with a project. She is putting together a hypothetical new "life style" magazine and we need to factor in revenue from advertising. Does anyone have any idea as to what sort of percentage of such a magazine's revenue comes from advertisements, rather than cover price? I understand that there will be a lot of contributory factors, particularly circulation and target market but it is only a project and the logic and reasoning are more important than the actual results. If anyone has any suggestions we will both be very grateful.