I am trying to brew edme red ale pre hopped 4lb cans. I have 2 cans and the directions say to either use 700g of corn sugar or 900g of DME. I was going to use DME but I am confused about how much for 5 gal. Should I use 2 cans and double the DME to 1800g for 5 gallon batch. If anyone could give me any advice I would greatly appreciate it.