Sum cells by background color (ie: highlighting)

[Legacy 328669]

Can anyone please tell me how to sum a column of cells by the background or highlighted color? I need to take priced that need to be added and when they are paid, they are highlighted and then deducted from the total. I can do the deduction part, just cant figure out the sum by the background color.
Thanks
Karen

 

[gaz_chops]

Welcome to the forum.

Are the cells highlighted using conditional formatting? If so, what criteria is used?