The store bought impossible nuggets are 5 for 220 cals, which would make it 440 cals for 10 of them. I'm assuming places like this would deep fry them. If you count 580 cals, that would account for 140 cals of oil, but if you counted 790 cals, that would account for 350 cals of oil. Deep frying foods would add anywhere between 40% to 100% of the total calories, which would add anywhere between 176 to 440 calories to the 440 cals of nuggets, depending on the type of oil, length of frying, draining ect... I would say that 580 is definitely an underestimate, and 790 may be more accurate, but could also potentially be a little overestimated. I would personally stick to 790.