=SUM(B2:F2) =SUM(B2:B9)
=VLOOKUP(A2,$F$2G$4,2,0)
=ROUND(MAX((A3-3500)*{0.03,0.1,0.2,0.25,0.3,0.35,0.45}-{0,105,555,1005,2755,5505,13505},0),2)