Dry Weight?

hi all, iv just harvested my 1st crop, i trimmed all the leaves so there was just the buds and the stem's they wieghed 28 oz i know the stem's will account for some of the weight but how much wieght will i lose to drying??? does any1 know what my final dry weight should be???

U will lose about 75% after drying, then more when u weighted with stems. maybe 85%

After my calculations that would be ca 4-4.5 oz