Okay, so you've received your invoice that we sent via Freshbooks, which is our online accounting system. Now you want to know how to pay. All of our invoices are paid via PayPal, which offers secure online processing of pretty much any credit card.
It does not require a PayPal account at all, but if you have one already setup with a credit card, it can be easier.
Here are 2 videos that explain the process: