It's kind of like asking how much is it going to be to build a house. It all depends on the complexity of the show. Many effects? Lots of color correction? Audio sweetening and so on. It also depends on your skill level as an editor. There's really no answer to this question without knowing more about the program.
[Jake Cauty]"program for broadcast." and "I'm in to audio mix, colour correct, graphics etc"
With respect, I've never worked with nor met anyone who can sound mix to broadcast standard and colour grade to broadcast standard. That's normally two different people. Perhaps you are a rare talent - and I will accept that, if you are.
My point being, it's for broadcast and there are standards to be met, or your program will be rejected. You are comfortable with the challenge ahead of you?