It depends so much on where you are, when you need to feed, etc etc.
l am at 1000ft in Cumbria. It is very cold and wet, I have to feed between mid Oct and the end of April.
I've just calculated I spend £30 on hard feed and £60 on hay, per year, per sheep.
The worming, fly stuff, minerals, shearing, vaccinations, come in at <£10 a sheep.
So I reckon each sheep seems to cost me around £100 to raise! I make about £120 per carcase, sold directly to the public (friends, their friends). And perhaps £5-10 on some fleeces.
This used to work well with Rough Fells when I got the tup lambs away in October, before the winter. Now I have to take my Shetlands through the winter before they can go to the butchers, so a lot more money on feed, and the margins are therefore minimal.
Obviously if you have grass for longer, your returns are better and if you have a fast-maturing breed. And if you can make your own hay, and buy feed in bulk (I'm too small an operation for either of these).