I think I am responsible for some your confusion.
I think I jacked up the spreadsheet when I was tring to figure out why the spreadsheet was adding an extra 2 inches to the innerface lenth and width in addition to the seam allowance. That 14b cell is suppose to be yellow( a function cell) like the length cell 15b below it, but now seems hardcoded for 42.
I PM'd the OP but haven't heard back. The Spread sheet isn't locked and I guess I proved the problem with that.
Someone mentioned the ability to roll back the sheet, but I can't for the life of me figured out how to do that.
I beg forgiveness from the forum for my sins.
I did find out that you can exort the spreadsheet to your computer an an excel file, so if it does get fixed, I promise to keep my paws off it.
Very sorry to all,