Want to discount everything except logistics on your project?
First, Head to your Inventory and click Add Inventory
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!