Getting "Too many functions" in Excel formula - excel

Question

I am writing a formula for Excel. Excel says that I entered too many arguments. Am I missing any brackets or my formula is wrong?
10000+IF(AND(F5>=98%, (D17-D125)>0),((D5*2.5)+(0.2*(D17-D125))),(D5*2.5),IF(AND(98%>F5,F5>=90%,(D17-D125)>0),((D5*1.5)+(0.1*(D17-D125))),(D5*1.5),IF(AND(90%>F5,F5>=80%,(D17-D125)>0),((D5*0.5)+(0.05*(D17-D125))),(D5*0.5),IF(AND(F5<80%),(D17-D125)>0),((D5*0)+(0*(D17-D125))),(D5*0))))
Is there any shorter formula to use?

Answer 1

So, quick example to show how vlookup() works, Excel has good examples in the Function Reference. vlookup() can have all the arguments built-in so only one cell needed. Just shown it like this to show.
=VLOOKUP(A2,$A$7:$B$11,2,1)

Answer 2

I don't know what your intentions are mathematically, and it definitely seems like theres a simple solution here. But when analyzing your formula.. I had trouble almost instantly when breaking it up into a more procedural If/then/else structure.. So you do have misplaced parens, extra parameters to IF(), etc.
I really like the LET() function to setup variable names or simply to avoid repeating myself. And then since you're chaining IFs, just use IFS() instead..
LET() works like LET(name1, value1, name2, value2, result).
IFS() works like IFS(condition1, resultIf1, condition2, resultIf2)
Something like the following is at least easier on the eyes..
LET(
VarA, F5,
VarB, D17-D125,
VarC, D5,
VarD, VarB > 0,
IFS(
AND(VarA > 98%, VarD), D5*2.5,
AND(VarA < 98%, VarA >= 90%, VarD), D5*1.5 + 0.1*VarB,
AND(VarA < 90%, VarA >= 80%, VarD), D5*0.5 + 0.5*VarB,
...
TRUE, default value
)
)