Table:
0
A
B
C
D
E
1
Number & name
Description
Current status
Livery
Date
2
Scottish Tar Distillers No. 78
Rectangular Tanker
Static display in the museum.
Black
1877
3
Oakbank Oil Company No. 13
10T Tanker
Static display in the museum.
Black
1894
4
No. A43
Shell BP Tanker
Static display in the museum.
Black
1897
5
Naval Store No. 161
14T Tanker
Static display in the museum.
Black
1918
6
Briggs, Dundee No. 20
14T Tanker
Operational.
Black
1918
7
Briggs No. 17
14T Tanker
Stored.
Black
1927
8
No. 206
20T Tanker
Stored.
Silver DCL
1930
9
No. 241
20T Tanker
Stored.
Silver DCL
1940
10
No. 4
20T Tanker
Stored.
BP Chemicals
1941
11
No. 14
14T Nitric Acid Tanker
Static display in the museum.
Grey
1941
12
No. 252
20T Tanker
Stored.
Distiller's Co. Ltd Silver
1951
13
No. 261
20T Tanker
Stored.
British Hydrocarbon Chemicals Silver
1956
14
No. BPO67496
45T TTA Tanker
Stored.
BP Green
1966

Questions and formulas:
Question: Which Livery has a Description of 20t tanker, with a date later than 1941?
Formula: LET(query1,LET(query1,FILTER(A1:E1,B1="20t tanker"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)>1941))
Formula2: LET(query1,LET(query1,FILTER(A2:E14,B2:B14="20t tanker"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)>1941))
Level: hard
Question: What's the Description for Scottish Tar Distillers No. 78, that's Livery is black, and a date prior to 1897?
Formula: LET(query1,LET(query1,FILTER(A1:E1,(D1="black")*(A1="scottish tar distillers no. 78")),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<1897))
Formula2: LET(query1,LET(query1,FILTER(A2:E14,(D2:D14="black")*(A2:A14="scottish tar distillers no. 78")),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<1897))
Level: hard