Table:
0
A
B
C
D
E
1
Manufacturer
Model
Quantity
Introduced
Retired
2
Douglas
C-54 Skymaster
6
1947
1966
3
Douglas
C-47 Dakota
2
1947
1964
4
de Havilland
DH.114 Heron
7
1952
1960
5
Fokker
F-27 Friendship
8
1958
1977
6
Douglas
DC-6A/C
1
1961
1965
7
Douglas
DC-6B
7
1962
1973
8
Fokker
F-28 Fellowship
6
1969
1986
9
Boeing
737-200
20
1969
1994
10
Boeing
767-200
2
1984
1986
11
Boeing
737-400
7
1989
2004
12
Boeing
737-500
17
1990
2004
13
Fokker
100
5
1997
1999
14
Boeing
737-300
1
1997
1999
15
Boeing
737-700
13
1998
2004
16
British Aerospace
146–200
10
1998
2001

Questions and formulas:
Question: How many in the introduced section had Fokker as a manufacturer, a quantity of 5, and retired later than 1999?
Formula: LET(query1,LET(query1,FILTER(A1:E1,(A1="fokker")*(E1>1999)),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=5))
Formula2: LET(query1,LET(query1,FILTER(A2:E16,(A2:A16="fokker")*(E2:E16>1999)),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=5))
Level: hard
Question: What is the total number of quantity when the introductory year was 1984?
Formula: SUM(FILTER(C1, D1=1984))
Formula2: SUM(FILTER(C2:C16, D2:D16=1984))
Level: easy
Question: How many in the introduced segment retired later than 1994 and had Fokker as a manufacturer?
Formula: ROWS(UNIQUE(FILTER(D1, (E1>1994)*(A1="fokker"))))
Formula2: ROWS(UNIQUE(FILTER(D2:D16, (E2:E16>1994)*(A2:A16="fokker"))))
Level: medium
Question: How many in the quantity section had Fokker as a manufacturer and retired later than 1999?
Formula: SUM(FILTER(C1, (A1="fokker")*(E1>1999)))
Formula2: SUM(FILTER(C2:C16, (A2:A16="fokker")*(E2:E16>1999)))
Level: easy