Erm if you look at the cals and sat fat on mix veg bag it will tell you once worked out, it all depends on what type of veg as some you don't point and others do, if it includes sweetcorn and peas then your looking about 0.5/1 point per 80gs i think!
it's best to look at your own bag as each differ but, the tesco's "Farmhouse Mixed Vegetables" which has all of the above you've said and also cauliflower is; 0.5 points per 100g frozen