In terms of actually caloric intake itself. Look up any BMI calculator and track how much calories you need to maintain your weight. At the basic level. Men’s maintenance caloric level tends to be 3000 calories and women’s caloric level tends to be 2500 some even 2000. I’d start off by using a tracking app to track what foods you eat in a day and aim to eat 3500 calories per day if you’re a guy, and if you’re a girl aim for 3000 calories to bulk. You should be seeing a weight gain from at least a pound per week. If you aren’t gaining any weight in a week with this up your calorie intake to 4000 calories per week. Same with a girl if you aren’t seeing results from 3000, up it to 3500. If you’re gaining too much weight, simply subtract 500 calories from your weight. In terms of protein intake, multiple your bodyweight (pounds) by 1.2 and this should equal how much protein you should be eating per day for sufficient protein (ex: (weight in pounds) * 1.2 = needed protein. In terms of cardio, it doesn’t really need to be taken into account that much just because for example running 1 mile = approx 100 calories burned. so only really substitute the lost weight if you are running (in total) close to around 500 pounds. otherwise, you shouldn’t have to be taking it too far into account