[palidanx]

From the regulations (The questions page)

N16. How is total carbohydrate calculated? Answer: Total carbohydrate is calculated by subtracting the weight of crude protein, total fat, moisture, and ash from the total weight (“wet weight”) of the sample of food. 21 CFR 101.9(c)(6)

N17. Does total carbohydrate include dietary fiber? Answer: Yes. Dietary fiber must be listed as a subcomponent under total carbohydrate. 21 CFR 101.9(c)(6)

N18. What is meant by sugars on the Nutrition Facts label? Answer: To calculate sugars for the Nutrition Facts label, determine the weight in grams of all free monosaccharides and disaccharides in the sample of food. The other nutrients declared on the nutrition label are defined in 21 CFR 101.9(c). 21 CFR 101.9(c)(6)(ii)