Check out one of the many free or low-cost video conferencing options which allows easy "face to face" communication. There are a host of tech tools to meet this need - Microsoft Teams, Zoom, FaceTime (commonly through iPhones), Facebook Live, and more.
Send invoices digitally and allow your customers to pay without visiting your store or location. There are many low-cost online invoicing systems which allow you to send invoices and get paid online. Some of these services include Paypal, Venmo, and Zelle. Check your local bank for additional paying services.