how do i sum multiple sheets (Sumif)

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I ahve the attached Workbook, and I want to create a totals sheet that will look at each Tab and sum the totals for each month.

ON PNCAPPROVES_TOTAL  I want to sum all the hours on the other two tabs based on Column B.

So in other words sum all the hours for "Lerman" from the two tabs and place in Cell C2. Do this for each value in Column B of PNCApproves_Total.

This is Sample data.
Managed-Account-Programs-PNCAPPR.xlsx
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Commented:
Formula in C2, see file.

``````=IFERROR(SUMIF(Proposal_PNCapproves!\$C\$8:\$C\$25,\$B2,INDEX(Proposal_PNCapproves!\$D\$8:\$X\$25,,MATCH(C\$1,Proposal_PNCapproves!\$D\$6:\$X\$6,0))),0)+IFERROR(SUMIF(Bonaire_PncApproves!\$C\$8:\$C\$30,\$B2,INDEX(Bonaire_PncApproves!\$D\$8:\$V\$30,,MATCH(C\$1,Bonaire_PncApproves!\$D\$6:\$V\$6,0))),0)
``````
Managed-Account-Programs-PNCAPPR.xlsx

Commented:
=SUMIFS(Proposal_PNCapproves!D\$9:D\$15,Proposal_PNCapproves!\$C\$9:\$C\$15,\$B2)+SUMIFS(Bonaire_PncApproves!D\$9:D\$14,Bonaire_PncApproves!\$C\$9:\$C\$14,PNCAPPROVES_TOTAL!\$B2)

Start in c2 and copy across and down

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