Calories and sugar per gummy are not on the page we reviewed.
They are on the Supplement Facts panel of the bottle, along with the serving size and servings per container. The page does not publish per-gummy ingredient amounts, and the daily serving count is not disclosed, so you cannot estimate it from the website.
A gummy can have a small amount of sugar per piece, but several a day adds up.
Ask the seller for an image of the panel before ordering. When the bottle arrives, multiply per-serving values by your actual daily servings. If you manage blood sugar, weight or a low-carb diet, include it in your count and ask your doctor or dietitian if unsure.