Index-Match with Sum-Function

Question

I have two tabs Product-Overview and Prices.

On the Prices-tab I would like to add my data and get an overview on the financials tab.

I was trying to use index-match, however if there are several values in the same month in my Prices-tab I am not sure how to sum the up?

I would like to get the following result:

Find below my minimum viable example as google sheet:

Google Sheet

Any suggestions how to do this?

Answer 1

delete column D and use this in D2:

=ARRAYFORMULA(IF(A2:A="";;TEXT(B2:B; "mm/yy")))

then you can do this:

=QUERY(Prices!A2:D; "select A,sum(C) where A is not null group by A pivot D")

and more advanced in O5:

=ARRAYFORMULA(IF(O1:1="";;IF(B5:B="";;
 IFNA(VLOOKUP(B5:B; QUERY(Prices!A2:D; 
 "select A,sum(C) where A is not null group by A pivot D"); 
 MATCH(TO_TEXT(O1:T1); QUERY(QUERY(Prices!A2:D; 
 "select sum(C) where A is not null group by A pivot D"); 
 "limit 0"; 1); 0)+1; 0))*1)))

of course B5 can be:

=SORT(UNIQUE(Prices!A2:A))

then D5 can be:

=ARRAYFORMULA(IF(B5:B="";;"Product "&REGEXEXTRACT(TO_TEXT(B5:B); ".(\d+)")))

average N5 can be done like:

=ARRAYFORMULA(QUERY(TRANSPOSE(QUERY(TRANSPOSE(O5:100);
 "select "&TEXTJOIN(","; 1; IF(B5:B="";; 
 "avg(Col"&ROW(O5:O)-ROW(O5)+1&")"))&""));
 "select Col2"))

generating dates in O1 like:

=ARRAYFORMULA(ARRAY_CONSTRAIN(TRANSPOSE(UNIQUE(TEXT(ROW(INDIRECT(
 DATEVALUE("1/11/2020")&":"&
 DATEVALUE("1/11/2050"))); "mm/yy"))); 1; COLUMNS(O1:1)-1))

and years in O2 like:

=ARRAYFORMULA(IFNA(20&REGEXEXTRACT(O1:1; "/(\d+)")))