A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
This is limitation for Computer calculation.
Floating-point arithmetic may give inaccurate result in Excel - Office | Microsoft Learn
Try
=round(if(sum(f84:o84)-(((c84-b84)*24)*s84)>=0,sum(f84:O84)-(((c84-b84)*24)*s84),0),2)