form: if has netContent is "grams" or "liters" serving size calculated form { unit: "gram", amount: "454", # # servingsPerContainer # servings: { listed: { servings per container: "38", serving size amount: "12" }, # # 454 / 12 # calculated: { serving size amount: str (Fraction (454, 12)) } }, } if doesn't, like capsules, form { unit: "capsule", amount: 90, serving size amount: 1 }