From the Transactions page, tap or click on the add transaction button. Search for a profile and select it from the list, then select the correct date (or leave the current one if appropriate) and the location of the transaction.
Now you can add the items to your transaction. Input the quantity of the item, select the item group from the list, and enter a description and price. You can add more line items to the transaction by clicking or tapping on ‘Add Another Item’ and you can remove items by tapping the delete button on the right hand side of the item you want to delete.
Lastly you can add a note to the transaction at the end. Notes on transactions are visible to anyone who can see the transaction. So if you (a member profile) have the transaction associated to your profile, that means that staff profiles can see the transaction, but other member profiles cannot.