How much is it to get the inside seats shampooed or cleaned well?

Don't

Last time, I spent $70 for an inside complete shampoo.

Call them and ask them it's not that much plus they do a phenomenal job

They're priced quite reasonably. But they are a drive-thru so I don't know if that's a service they provide as it would take a little bit more time. I would assume you could approach that and they be interested in talking to you about it they're a good bunch of guys