It'll be 100% syn so if it comes in a pack with nutritional values - divide calories by 20. That'll give you the total syn value so you can then divide it by the number of servings.
If it comes without packaging - your guess will be as good as any ... sorry
Thanks sadly I didn't but they went to do much trouble I ate it. I could have used all those syns on something much better. Oh well it's done now. I will need to look calories up online. Thanks for the reply