Prepare a boiling water canner. Heat a small amount of water for the lids.
In a very large stockpot, heat juice. Stir in contents of one box of pectin and mix well. Bring to a rolling boil while stirring constantly.
Add all sugar at once and stir until dissolved. Bring to a rolling boil, stirring constantly, and boil for exactly 1 minute, Remove from heat.
Ladle into hot jars. Wipe off rims and screw tops with a clean damp cloth. Top each jar with a warm lid, then twist on a band until tight.
Process jars in a boiling water canner for 6 minutes. Let cool, undisturbed, on a wire rack or a kitchen towel for 24 hours. Check jars for seal. Refrigerate unsealed jars.
Label jars with contents and date. Store in a cool and dark place for up to 1 year. Refrigerate open jars and use within 3 weeks.
Notes
Please note that you will get the best results following the directions included with the pectin you buy.