Table:
0
A
B
C
D
E
F
G
1
Class
Wheel arrangement
Fleet number(s)
Manufacturer
Year made
Quantity made
Quantity preserved
2
0-6-0 — OOO
0-6-0 — OOO
0-6-0 — OOO
0-6-0 — OOO
0-6-0 — OOO
0-6-0 — OOO
0-6-0 — OOO
3
B
0-6-0
321
Rhode Island
1887
1
1
4
B
0-6-0
323, 325
Rhode Island
1892
2
0
5
B-1
0-6-0
326–333
Alco -Cooke
1902–1907
8
0
6
B-2
0-6-0
334–339
Alco -Schenectady
1909–1910
6
0
7
B-3
0-6-0
340–343
Alco -Schenectady
1912
4
0
8
B-4
0-6-0
344–349
Alco -Schenectady
1915
6
1
9
B-4
0-6-0
350–354
Alco -Brooks
1920
5
1
10
B-20
0-6-0
2308–2313
Schenectady
1886
6
0
11
B-21
0-6-0
2314–2316
Brooks
1892
3
0
12
B-22
0-6-0
2317–2320
Brooks
1900
4
0
13
B-23
0-6-0
2321–2328
Brooks & Alco-Brooks
1899–1809
8
0

Questions and formulas:
Question: What manufacturer made 6 and preserved 1?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,(F1=6)*(G1=1)),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G13,(F2:F13=6)*(G2:G13=1)),4))
Level: medium
Question: How many did alco -schenectady preserve of class b-3?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,(D1="alco -schenectady")*(A1="b-3")),7))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G13,(D2:D13="alco -schenectady")*(A2:A13="b-3")),7))
Level: medium
Question: What manufacturer made class b-2?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,A1="b-2"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G13,A2:A13="b-2"),4))
Level: medium