My letters for the values won’t match the spreadsheet. For example you command it to move 1 inch call that C for command. It uses the current factor, CF, to multiply C and turns some number of turns that gets the actual distance A. So we need a new factor, NF, to replace the current one so we get what we asked for in the first place. Make a ratio between the new factor and command equal the ratio of current factor and actual we get NF=CF/A * C.
I didn’t open the spreadsheet, who knows where it has been and what it may have contracted. But, I was able to take a peek at the numbers in it and if plug them into that formula I get the number in the spreadsheet.