What would it cost?

[71400lb]

Okay, I just need a ballpark figure.
I have a 1971 Cheyenne c-20 2wd(HO52 10 bolt open rear) long bed with a pass side rear wheel cylinder leaking badly(have to fill the resevoir once a week, as it's half empty at that point!).
So I assume I have to have both sides done with new wheel cylinders, brake shoes and possibly turning the drums. Being that it's a 3/4 ton, they need to pull the axels to get to the wheel cylinders, right?

What should this cost at an average repair shop?

Thanks