Hi Matt and welcome
In the attached I've added formulas to the table on the right that sums the spend by month using the below formula (in column S for budget code 1)
For the other budget codes in subsequent columns I've used the same formula but substituted the number in red for the appropriate budget code.
As for the 2nd part of your question, it can be done in several ways.
You could use conditional formatting to change the colour of the spend totals, red if they're over budget and green if they're within budget for example.
Adding/Subtracting the Underspend/Overspend would require you to add some additional columns so you have an "original budget" and "revised budget" column for each of the budget codes.
Does that sound like something that would work?
BSB
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