The issue is well formed; cash would be an unusual method of payment for a towing company. I would have sit down with a towing company that was depositing reportable amounts of currency and just chat about their business; e.g. how many calls a day, a week, average fee, etc. If every customer paid in cash, that would still mean 51 $200 tows in a day.
A towing company for semi's and semi tractors might have different sets of numbers and payment methods, dunno.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.