The steps provided by my colleagues are for the Online version, SAMPHORs.

Let me explain how the Budget vs Actual report works. The $ Over Budget column shows the difference amount between the budgeted and actual amounts. A negative amount means you are under budget, while a positive amount means you are over budget. The % of Budget column is the percentage margin of your budget that is earned or spent. 

In the Desktop version, there's no need to add the remaining balance. The $ Over Budget column will already show you the difference amount between the budgeted and actual amounts.

Although, if the expenses are the ones showing as negative, it's favorable in your part. This means that your actual expenses are less than the budgeted amount.

You can tag me if you have more questions. I'll get back with you as soon as I can.