if you cut out all the other details they mentioned I guess. how much do you think taking the cash to the bank weekly costs?

Nothing, because the owner is rejoicing every step of the way.

I'd say employee theft is the only reason a coffee shop would be "no-cash", and fear of robbery in a few places.

Transporting and handling cash is absolutely not free, and unlike joe sixpack taking out $20k in a stack of benjamins that one time to buy a motorcycle with cash, it's much worse when

a. a lot of it is coins, so it's heavy and bulky, and

b. it becomes a regular thing that everyone on the street observes you doing over and over

You think the owner is taking the cash to the bank?? Unless they are an one-person operation, they likely have an employee do it (among their other duties).

The employee will of course rejoice on the owner's behalf when walking to the bank.