Ten products. A teenager helping. No website. With one generic QR taped to the tent pole, Rosie is the checkout: every sale needs her eyes on a screen and her mouth saying "twenty-one dollars" for the eighth time that hour.
With a card next to each product, three customers pay at once, correct amount, right account, product name in the note, while her hands bag and her mouth sells the second jar. Her kid runs the table alone because the cards know the prices.
Her payment feed reads "$21.00, Honey 16oz (HNY-16)" twenty times over. She runs two Venmo accounts, @rosies-farm for the honey and jam and @rosie-candles for the candle side-business, and each card pays the right one without her thinking about it.