Late with this, but I'd go with the lower number. https://www.fatsecret.com/calories-nutrition/generic/dewberries-raw Dewberries have 7.03g sugar/cup Via calories you can convert that: 100g berries/43cal and 1c berries/62cal so dewberries have 7.03g sugar/144g berries. Convert that again you get 7.03g sugar/0.317# fruit or 22.17g sugar/# fruit. Times 12# fruit you have 266g sugar from dewberries. You added 3061g sugar so total sugar is 3327g. Winecalc tells me that puts your SG around 1.094.