Recipe for 5 gallons of grape wine

13 11.5 oz. cans Welch's grape concentrate from Concord grapes
3 lbs. sugar
8 tsp. acid blend
4 tsp. pectic enzyme
4 tsp. yeast nutrient

after fermentation is complete:

3/4 tsp. Potassium Metabisulfate
2 1/2 tsp. Potassium Sorbate
3 to 4 11.5 oz. cans Welch's Grape Concentrate