Steve wrote:
There is a flat transaction fee and a percentage. Small volume businesses
pay highest for both.


Depends on how small the business's CC traffic is.

My plane co-owner owns a bicycle shop. I've worked part time there for
7 years. I think the original $15 number is far overstated based on his
business, as well as another friend's (2) package stores.

Everybody charges nearly everything at the package store, and most
transactions are under $15. Think about the typical lunch transaction.
$6, $7, maybe $9 or $10? All of my favorite one-off lunch haunts
gladly accept my cards.

Specifically at the bike shop, transactions over $35 are cheaper for the
merchant if the customer uses a debit card, under is better with credit.
We encourage college students who want to buy a $5 tube with a debit
card to let us run it as a Visa or Mastercard.