Table:
0
A
B
C
D
E
F
1
Class
Wheel arrangement
Manufacturer
Year made
Quantity made
Quantity preserved
2
4-4-0 — ooOO — American
4-4-0 — ooOO — American
4-4-0 — ooOO — American
4-4-0 — ooOO — American
4-4-0 — ooOO — American
4-4-0 — ooOO — American
3
C
4-4-0
Baldwin
1886–1887
6
0
4
C-1
4-4-0
New Jersey
1857
1
0
5
C-1
4-4-0
New Jersey
1862
1
0
6
V
4-4-0
New Jersey
1855
1
0
7
C-3
4-4-0
Rhode Island
1884
2
0
8
C-4/C-5
4-4-0
Baldwin
1886–1887
44
0
9
C-5-s
4-4-0
MStP&SSteM (rebuilder)
1928–1931 (rebuilt)
9
0
10
C-20
4-4-0
Schenectady
1882
2
0
11
C-21
4-4-0
Schenectady
1885
12
0
12
C-22
4-4-0
Schenectady
1886
11
0
13
C-23
4-4-0
Baldwin
1886–1887
12
0
14
C-24
4-4-0
Brooks
1902 (rebuilt)
1
0
15
C-25
4-4-0
Schenectady
1887
2
0

Questions and formulas:
Question: What is Manufacturer, when Quantity Made is 2, and when Year Made is 1884?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(E1=2)*(D1="1884")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(E2:E15=2)*(D2:D15="1884")),3))
Level: medium
Question: What is Quantity Made, when Manufacturer is "Baldwin"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="baldwin"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,C2:C15="baldwin"),5))
Level: medium
Question: What is Wheel Arrangement, when Manufacturer is "Baldwin", and when Quantity Made is 12?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(C1="baldwin")*(E1=12)),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(C2:C15="baldwin")*(E2:E15=12)),2))
Level: medium
Question: What is Quantity Made, when Year Made is "4-4-0 — oooo — american"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="4-4-0 — oooo — american"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,D2:D15="4-4-0 — oooo — american"),5))
Level: medium
Question: What is Wheel Arrangement, when Quantity Made is 44?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1=44),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,E2:E15=44),2))
Level: medium
Question: What is Quantitiy Made, when Quantity Preserved is "4-4-0 — oooo — american"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="4-4-0 — oooo — american"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,F2:F15="4-4-0 — oooo — american"),5))
Level: medium