Spreadsheet X Excel formula [Solved]

[jrozsas]

I have a doubt regarding the spreadsheet, in a formula.
Excel , in column "G":
=IF(A2<>"MC";IF(A2<>"PS";IF(E2>F2;E2-F2;" ");" ");" ")
In HP Prime:
=IFTE($A$2<>"MC",IFTE($A$2<>"PS",IFTE(E2>F2,E2-F2,""),""),"")
Work Fine! OK

But in cell "C3" in excel:
=IF(A3="PS";F3+B3;IF(A3="MC";F3+B3;LOOKUP(2;1/(LEN(C2)>0);C2:C3)))

how to make this formula into the calculator?Attached are the two files to excel and Prime hp
I appreciate the help.