Brick warehouse cleaning

i just got a call from a company to clean the interior of some brick warehouses each one is 70x97 with 35 foot ceilings. I have no idea how to charge lol they say they just want the loose dirt knocked off so they can paint. They want walls and ceilings cleaned. Any tips? They say they had licorice root in the warehouses so there shouldnt be any grease.

Why don’t you go look at and take some pics. Otherwise no one on here is going to be able to give you a clue how to clean w/o a lot more details

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