Changing pie chart sum in Numbers

Hi there, I’ve customized the base ‘Simple Budget” in Numbers... I’m looking to have the pie chart sum equal to monthly income with the pie chart chunks showing “needs,” “wants,” and with the final chunk showing what’s remaining from monthly income after the needs and wants are taking out. Right now the way the pie chart exists from the template is that the income number is a chunk of the chart rather than the sum. Is this a feature that exists in Numbers? I have the totals in numbers in graphs around it but I’d like to see it visually represented in the pie chart.