Also on that Fundera web page:

"First Data Price
As mentioned earlier, First Data will likely quote you a price based on the services you need, your industry, and your business’s transaction volume, along with other factors. You’ll likely pay a lump sum for your hardware, a monthly fee for your software, and a per-transaction fee for payment processing. First Data uses interchange-plus pricing to assess fees on credit card transactions, with higher volume merchants getting better rates."