To ripe berries, add four cups water. Bring to boil and simmer, covered, 10 minutes. Strain through cloth bag, squeezing out juice. Mix Sure Jell with juice in a 6-8 quart saucepan. Bring quickly to a hard boil, stirring occasionally. Add sugar all at once. Cook and stir. When mixture returns to full rolling boil, cook and stir one minute more. Remove from heat, skim off foam, pour in jars and seal.