This method relies on fundraisers having the correct event (campaign) applied to their fundraiser record in GivePanel.
Campaign / Event Dashboard
Go to "Dashboard" in the main navigation bar at the top of your account.
Once on the dashboard page, select the ''campaigns'' icon in the top left of your account.
Select the name of the event you are looking to report on in the ''please select an event'' drop-down.
This will pull in income for all fundraiser records that have the event applied to their fundraiser record.