I'm getting a tat this weeknd an tge gentleman doing it says it'll be 100$ an hour but say it comes out to 3hrs wont charge me the full three that was just an example he gave me but the tat I'm getting I have no idea how long it'll take should I ask so I know how much to bring or is there a set number I should bring with me. P.s. it'll be on my ribs an it wont be that big