Multiple Criteria SUMIF Using Column as Negative Criteria

Hello Everyone,

I've attached a sample workbook to show what I am trying to do. I would like the formula to say "if Sheet2!A:A is "MON" and if Sheet2!R:R matches Sheet3!A:A, and if Sheet2!I:I doesn't match any of the values from Sheet1L:L, then I'd like the sum of Sheet2!F:F. It seems pretty simple but I've tried a million different variations of SUMIFS, SUMIF, IF, AND, etc. and I can't figure it out.

If someone could help, that'd be great! Thanks in advance!

TestBook4.xlsx

Thanks all who took the time to check this out but I think I got it to work with a SUMPRODUCT formula.

=SUMPRODUCT(--(Sheet2!A:A="MON"),--(Sheet2!R:R=A3),--(Sheet2!I:I<>Sheet1!O:O),Sheet2!F:F)