Concatenating from table to string, sum amounts - google-sheets

Question

Consider the Google Sheets table below:
A B C D
1 category subcategory company amount
2 health care diagnostics AA 100
3 health care diagnostics AB 50
4 materials mining BA 75
5 financials banks CA 30
6 financials insurers CB 35
7 financials banks CC 10
8 financials banks CD 40
9 financials hedge fund CE 5
10 health care equipment DA 50
I would like to list, per subcategory, the companies in it, and the amount spent:
A B C
1 category companies amount
2 health care AA AB DA 200 <--- 100 + 50 + 50
3 materials BA 75
4 financials CA CB CC CD CE 120
Column A I will type myself / hardcode. But what formula in column B and C will give this result, depending on the value in A?

Answer 1

try:
=ARRAYFORMULA(IFNA(VLOOKUP(E3:E, QUERY({QUERY({A:D},
"select Col1,sum(Col4)
where Col1 is not null
group by Col1
label sum(Col4)'amount'", 1), {"companies";
TRIM(FLATTEN(QUERY(TRANSPOSE(QUERY(QUERY({A:D, C:C},
"select max(Col3)
where Col1 is not null
group by Col1
pivot Col5"),
"offset 1", 0)),,9^9)))}},
"select Col1,Col3,Col2", 1), {2,3}, 0)))
where E3:E are your hardcoded values