All my washes are now 2IBA with 5-6SS but I used to have 1/4 local doing around 22K/month and around 1750 washes on the one IBA ...a MKVII GT500
I think we spent on average around 1200-1500 a month on CSI chems....good stuff but pricey.
Performix soaps, green tire cleaner, drum packs for SS...