Recently, I checked just how much the Skip Button can charge. At Lv8000, Helen costs 3Q to level up once, but to Skip 25 levels, she costs 316Q, when she SHOULD only cost 75Q. It's literally over quadruple the proper price. Ouch, talk about gouging.
Wow yeah, even if accounting for each level getting more expensive, is still probably comes out to 4x the normal price or more. I don't think it should cost that much just to save some clicking to get back to levels you've gotten your girls to before. Even if such a "shortcut" should still cost something, 2x the normal price would be plenty.