Vinyl letter removal

Is there a standard pricing for vinyl letter removal from glass? $5 per 2’x2’ pane may be too low?

If there is it’s silly. Sometimes it’s a bitch to get off an takes longer, Sometimes it comes off smooth.
I just tell them I’ll charge you my hourly rate , because it isn’t straight forward. It could come off real easy , which more than likely it will, or it might be a little more labor intense than usual.
It really depends too , if it’s small I’ll just throw a number at it. If it’s big … Hourly !