To offer rebates on the proposal you can use the Rebates Catalog. But you can also create a Custom Rebate, if, for any reason, it's not visible in the catalog.
You can add as many Custom Rebates as you want, just keep in mind, they are only applicable to this given job, and will not be available on other proposals.
They are calculated based on the Sale Price before the commission or any additional markups which only is visible to the admin users inside the Inspector (read more).
It's always a good idea to practice adding Rebates on Test Proposals (read more) so you are more comfortable.
How does it work?
On Summary page >> Rebates section >> click '+Add'
You will see Catalog tab and Create Custom tab
In the Custom tab name your Rebates
Specify Rebates amount
Select Contribution and/or Apply Contribution (read more)
Select if it's a Customer Direct Rebate (read more)
Save
You will see the Rebate in the Rebates section with the name and amount
To add another Rebate click '+Add' again
To Edit the custom rebate, simply click on its highlighted name
To Remove - click on the 'cross' icon next to the rebate's name
Example of creating a Custom Rebate:
