yeah but knowing what % of that 850 calories will be stored as fat or metabolized is the hard part and changes. obese ppl tend to store too many calories as fat due to bad genetics and other factors but are hungry all the time too...a combination that assures weight gain. People with better genetics are able to to eat to fullness without becoming obese because metabolism rises to accommodate surplus calories. That was the case for me. I ate 4-5k calories a day and never got above 190 for well over 15 years despite little exercise and being around 5'8. Other ppl could easily got to 300+ lbs on that diet. I would have jack in box for breakfast, panda express for lunch, and full dinner. plus lots of soda and snacks. It's all genes, in the end.

It’s also the same reason why schools in the US removed soda machines because it was a contributing factor to child obesity.

if only that was the only place to buy soda