The following is a step by step for selling a stuff in the form of a treatment package.
1. You Need to Make a Product With a Treatment Package Type
For the following next step, you can read this article
2. Go to Sell Page
Input / Select the customer name at the 'Customer Column' . After that, select the 'treatment package product ' that your customer want to buy and then 'Pay' the bills.
3. View History Package Product
If you've already made a sell, click the 'CONTACTS' page and choose the customer name who've buy the treatment package. Then click the 'Package' column.
Watch this tutorial video: