Hi @n0kitty ,
The transaction fees listed here only apply to sales made via the online checkout, and would not apply to processing orders via a third-party terminal in person. In this case you would not be using the Shopify checkout to process a sale, so therefore no transaction fees would apply.
This information is cited in our charges section on the Shopify Help Center:
If you’re using Shopify Payments, you aren’t charged transaction fees on orders for stores located in most countries. Also, transaction fees don’t apply for manual payment methods, which include cash on delivery (COD), bank deposits, checks, test orders, and draft orders marked as paid or pending. Transaction fees don’t apply for POS orders.
I hope this explains things but please let me know if you have further questions.
Kind regards,
Victor | Shopify Social Care