Salts CaSO4 4.2g, CaCl2 3.0g, 0.3g Kmeta, 3g Ascorbic Acid.
Based on boiling 7.10 gallonsliters at 1.048 for 30 minutes, this will decrease your wort by 0.50 gallonsliters, bringing your after boil OG to 1.051. You were planning on an OG of 1.051 so you are right on track. Nice job!