Goodshuffle Pro is designed for quoting and invoicing clients for rentals, but there are tools within Goodshuffle Pro to quickly charge clients for 'terminal' transactions.
First, create a 'Template Project' with the client 'Terminal Sale' or 'Cash Sale' (for example) - This'll allow you to report on how many often/how much you've made from 'terminal' transactions.
Next, when a client comes to purchase boxes or other 'quick sale' items, duplicate the order, and create a Line Item Group date for the date of the sale. Then, add the items and services the client is using.
Finally, either type in the customer's card information to capture a charge on their card or, if they pay in Cash/Check, record and 'Offline Payment'.
