Not attempting to do an Eric, just a bit of a guess, but I reckon, judging by current points, 48 should be enough to see us safe for another year.
At the moment only Plymouth look gone, with probably as many as 8 other teams in a scrap to avoid filling the other 2 places.
Looking at our remaining fixtures 6 are against teams in that group and 5 against teams in the top6.
So if, as i reckon we need another 20 points from 18 matches, we will need to win several of the matches against the teams near us, a couple v midtable sides and sneak a few points v top6.
Not going to be east and it would not surprise me if everything comes down to our last game.v Norwich.