The nutritional values sheet has everything you need, just divide the numbers below by 2 
50g is quite a small serving though, more snack size than meal and I’d probably stick to 100g at least if you’re going to replace meals (100g serving of Huel five times a day is 2000 calories).
I guess you might already have done this, but in case you haven’t… work out your total daily energy expenditure as well and just make sure you have less calories than that.
And you know… cardio 