Pre boil gravity 1.035 8brix Post boil gravity 1.050 13 brix Final gravity 1.012 ABV 5.0%
Based on boiling 8.00 gallonsliters at 1.035 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.039. You wanted an OG of 1.057. It looks like it will be under.