Salts CaSO4 3.2g, CaCl 2.1g, MgSO4 1.6g plus a quarter tab campden. 2.0g yeast nutrient and half a tab whirlfloc at 10 min. 1.5 min O2.
Based on boiling 7.00 gallonsliters at 1.044 for 30 minutes, this will decrease your wort by 0.50 gallonsliters, bringing your after boil OG to 1.047. You wanted an OG of 1.052. It looks like it will be under.