Here's a list of some of the repairs I do, and what I charge.
Move or sew on buttons $1.50 each
Take in skirt waist $12.50
Hem skirt $12.50
Elasticize a waistband on skirt or pants $20 (includes elastic)
Taper legs of pants (2 seams) $12
Taper legs of pants (4 seams) $20
Hem pants $8.50
Attach badges or emblems $2.50 each
Fix zippers $20
And that my friends is just about all I'll do.