Yeah I realise that they show the breakdown for each category of weapon. But it still doesn't show me how they derived the KPU for each quarter on each weapon in each row. The total sheet is just the sum of these KPU results and then averaged. The fact that these don't add up correctly in the totals sheet (example I gave as the TR totals) is clear indicator that the breakdown has incorrect data in some or all of the data points. Since these breakdowns only show the result of there KPU calculations and not there workings. I can't confirm their accuracy or find where the issue stems from. It could be a simple issue of incorrect data inputted into these sheets. Or it could be that the underlying formula is incorrect. Or if I wanted to be cynical, it could have been purposely altered after the fact to skew the overall result. Either way, the totals highlight an issue with the data that stems somewhere down the line and has resulted in incorrect data overall. At this point the spreadsheet is just a bunch of meaningless numbers.