ilc, theres a flaw in your spreadsheet (sorta)
i input the part price, then it dispays the tax as the proper 108.75% of that …
but then it adds the part price and the tax column together
so price | tax | total for a part reads like this: $100 | 108.75 | $208.75
but now the reason for the “sorta” comment: this is a turbo kit, so the lil glitch is just a foreshadowing of the future reality