How can I sum numbers that have a gray color-fill in cell?

[ScottD]

In Excel 2003, I have a row of 15 numbers and some of the cells in the row
have a 'gray' color-fill. I want to 'sum' only those numbers in the row
whose cell color-fill is 'gray'. It doesn't seem that SUMIF has a criteria
that can be selective by cell color-fill. Is there any easy way to sum
numbers in a row or column according to a cell color-fill criteria?

 

[Pete_UK]

Bob Phillips has lots on counting and summing cells based on colour
here:

http://www.xldynamic.com/source/xld.ColourCounter.html

Hope this helps.

Pete