I have a Samsung chrome book and i need to have someone help me reinstall the operating system. Is there a charge for that and how long does it take

Yes, there is a charge unless you have warranty

Their Geek Squad department would be able to answer those questions for you.

Takes about an hour u can do it yourself search Google or look on YouTube for tutorial

Typically it varies depending on device. But call geeksquad and they can give you a quote.

I hv no idea gv em a call