MEMPHIS, Tenn. After almost 10 months of a hard-fought strike battle, members of the Bakery, Confectionery, Tobacco Workers and Grain Millers Local 390G at International Flavors and Fragrances here decided March 28 to return to work and continue their fight inside the plant. They are now working under the “last, best and final offer” from the company, which had been voted down by the membership last June. The imposed conditions include an end to paid lunch breaks, no overtime pay after eight