On Sat, 6 Jan 2018 07:57:02 +0000, alan_m
wrote:

Unless a state law prohibits cash pricing being lower than credit card
sales.

It may not make any difference to the customer but it may make a big
difference to the retailer's profit if the merchant charges on cards is
a lot more expensive than handling cash

At USA fuel stops (convenience stores), a cash customer must walk into
store to pay. When this happens, the merchant can realize greater
profits since items bought within store will have a higher profit
margin.

Paying at the fuel pump, via credit card, does not insure the customer
will come into the store.

Hence, cash customers bring higher profits since many credit card
customers "fill-and-leave."

Again, I know of one US state that bans cash discounts...cash or
credit card is same price.