Can I pay cash for my bill at this location?

Combined with the more than 500 XFINITY stores, Comcast customers have access to over 8,000 cash payment locations across the country. With most 7-Eleven stores open 24 hours a day, seven days a week, cash-paying customers now have an around-the-clock option to pay their bills close to home

Simple tasks can be done at the reception desk without queuing.

I'm fairly certain you can, but you might want to call before you go to make sure

I believe so. Just tell them you're in to pay a bill and hopefully no wait