Table:
0
A
B
C
D
E
1
Class
Railway number(s)
Quantity
Year(s) of manufacture
Type
2
B/B2 to 1869: D
180–183, 208–251, 270–295, 306–317
86
1868–1878
1B n2
3
A from 1892: Aa
69", 121", 318–327, 334–336
15
1878–1888
1B n2
4
A
337–341, 363–367
10
1888–1891
1B n2
5
Ac ( de )
342–362, 368–377
31
1889–1897
1B n2v
6
E ( de )
401–410
10
1892
1′B1′ n3v
7
D ( de )
421–434
14
1898–1905
2′C n4v
8
AD
451–500, 1501–1538
88
1899–1907
2′B n2v
9
ADh
1541–1557
17
1907–1909
2′B h2
10
C
2001–2041
41
1909–1921
2′C1′ h4v

Questions and formulas:
Question: Which Year(s) of manufacture has a Type of 1b n2, and a Quantity of 10?
Formula: LET(query1,LET(query1,FILTER(A1:E1,E1="1b n2"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=10))
Formula2: LET(query1,LET(query1,FILTER(A2:E10,E2:E10="1b n2"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=10))
Level: hard
Question: Which Railway number(s) has a Year(s) of manufacture of 1899–1907?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="1899–1907"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,D2:D10="1899–1907"),2))
Level: medium