Want to discount everything except logistics on your project?
First, Head to your Inventory and click 'Services'.
Next, click 'Add Service' in the top right.
Then, select 'Discount Services'.
Here you can give your discount a name and description.
Next, select the Percent of Line Item Group Discount Structure and put in the percent.
Finally, click 'Save and Close'.
Now, when you add this discount to a project, it will only offer a discount on the items and services within that line item group!