You overpaid 0.035 for 760 chips in total, that'll be going towards the shipping (from OP to you).
I just can't win with this spreadsheet.

It's difficult to calculate when the number of buyers is still in flux. I'm sure it'll get sorted when we've got final numbers though.
Same here - OP should rework the spreadsheet.
I'm spending a lot time fiddling with the sheet.