Doesn't look like you've tried my formula in Post # 3 yet, but it seems like you want K2 to show 0 when M2 is Blank ( which was not in the description in your OP ), modified below, is this what you mean:
<colgroup><col style="width: 25pxpx"><col><col><col><col><col><col><col><col></colgroup><thead>
</thead><tbody>
[TD="align: center"]2[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]910[/TD]
[TD="align: right"][/TD]
[TD="align: right"]2[/TD]
[TD="align: center"]3[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"]0[/TD]
[TD="align: center"]4[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]1105[/TD]
[TD="align: right"][/TD]
[TD="align: right"]1[/TD]
[TD="align: center"]5[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]715[/TD]
[TD="align: right"][/TD]
[TD="align: right"]3[/TD]
[TD="align: center"]6[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]520[/TD]
[TD="align: right"][/TD]
[TD="align: right"]4[/TD]
[TD="align: center"]7[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]325[/TD]
[TD="align: right"][/TD]
[TD="align: right"]5[/TD]
[TD="align: center"]8[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]130[/TD]
[TD="align: right"][/TD]
[TD="align: right"]6[/TD]
[TD="align: center"]9[/TD]
[TD="align: right"]1300[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]0[/TD]
[TD="align: right"][/TD]
[TD="align: right"]7[/TD]
[TD="align: center"]10[/TD]
[TD="align: right"]32000[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]0[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
</tbody>
Sheet693
[TABLE="width: 85%"]
<tbody>[TR]
[TD]
Worksheet Formulas[TABLE="width: 100%"]
<thead>[TR="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]
[TH="width: 10px"]Cell[/TH]
[TH="align: left"]Formula[/TH]
[/TR]
</thead><tbody>[TR]
[TH="width: 10px, bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]K2[/TH]
[TD="align: left"]=IF(
OR(M2="",M2>6),0,IF(M2=0,F2,F2-F2*LOOKUP(M2,{1,2,3,4,5,6},{0.15,0.3,0.45,0.6,0.75,0.9})))[/TD]
[/TR]
</tbody>[/TABLE]
[/TD]
[/TR]
</tbody>[/TABLE]