Cursory examination of the google doc on OP shows total chips to be 10851.83, or 10836 if all values are truncated.

This spreadsheet is a mess. Note to all; colors in spreadsheets are not a good way to show data. It doesn't always sort properly, and it makes it difficult to include cells in subsequent calculations. For instance, a bunch of these rows are red. Does that mean they aren't included?
Ugh. I've got my work cut out for me.
Edit: Evidently chip sales were represented at the end of the spreadsheet. All's well. I'm copying to a new spreadsheet to get rid of some of the crazy clutter.