The New York Daily News is trying to win back grocers with three advertorial sections. The Daily News lost up to $100,000 in weekly ad revenue because of its "Dirty Shame" investigation of supermarkets. All but one of the city's major supermarket chains stopped running ads after a series said many stores had failed state inspections. The series, based on state inspection reports, began on May 3. Ken Frydman, News spokesman, said the paper hopes the supplements, which were produced for the ad department by a freelance writer, will "bring supermarkets back into the newspaper."