How do you clean Venetian blinds?

i have a commercial window cleaning customer who wants their blinds cleaned before their windows.
they are wooden slats never been cleaned before.
i considering doing it because i don’t want her searching and finding someone who will do both.
can anyone give me ideas on methods and pricing for the blind cleaning?
the windows are aprrox 4’ high by 5’ and there are i think there are 15 to 20 panes

I use a 6’ plastic folding table (or two if necessary), and custom metal hooks. I stand the table upright and lean it in an appropriate place outside or if able inside, put the metal hooks over the end. Then I remove the blinds and hang them from the hooks. With this set up I able to flatten 4-5 slats and wipe down with a damp cloth. I charge $ 15-$25/blind depending on size and give every fifth blind free.