Many auctions have other expenses such as food, advertising, location rental, etc. Add all of those expenses to the Auction Expense list and get a true value of the amount earn during the event.
You will find this under Before Auction, called Auction Expenses.
Click on the 'Add Auction Expense' to add your first expense.
Enter the Expense name and the Amount and click the 'Add' button.
It will create a list where you can update the amount or delete it. It also gives the total of expenses at the bottom. This will then appear as a negative (or debit) in the Running Totals report under the During Auction Tab.
From the running totals screen you can click the link to see all Upfront cost and all Expenses list.