Icelerate

On this page, it says the fund requirements for S ranking three of the modes. How was this calculated? I added up all the funds on the table in each mode and then multiplied by 0.8. I ended up getting 953 120G for Hector normal mode and 991 520 for Eliwood normal mode. I have uploaded my Excel file where I made my calculations. All data is from this website. Fire Emblem 7 Data.xlsx