Table:
0
A
B
C
D
E
1
Unit
Complement
Killed
Wounded
Missing
2
Head Quarters
150 off[icers] 1231 men
0 off 0 men
2 off 0 men
0 off 0 men
3
Personal Staff
83 off 9 men
7 off 0 men
22 off 0 men
0 off 0 men
4
Medical Staff
39 off 0 men
0 off 0 men
7 off 0 men
0 off 0 men
5
Artillery Corps
15 off 10 men
0 off 0 men
0 off 0 men
0 off 0 men
6
Royal Waggon Train
12 off 266 men
0 off 0 men
0 off 0 men
0 off 0 men
7
Royal Corps of Artillery Drivers
13 off 1212 men
0 off 0 men
0 off 0 men
0 off 0 men

Questions and formulas:
Question: What was the number of Personal Staff Units Killed?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="personal staff"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7="personal staff"),3))
Level: medium
Question: What was the Complement of Artillery Corps Units that had 0 off 0 men Killed or Wounded?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="0 off 0 men")*(D1="0 off 0 men")*(A1="artillery corps")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(C2:C7="0 off 0 men")*(D2:D7="0 off 0 men")*(A2:A7="artillery corps")),2))
Level: medium
Question: How many were Wounded while in a Unit with a Complement of 83 off 9 Men?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="83 off 9 men"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="83 off 9 men"),4))
Level: medium
Question: How many of the Royal Waggon Train Unit were Missing while having a Killed of 0 off 0 men and a Wounded of 0 off 0 men?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="0 off 0 men")*(D1="0 off 0 men")*(A1="royal waggon train")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(C2:C7="0 off 0 men")*(D2:D7="0 off 0 men")*(A2:A7="royal waggon train")),5))
Level: medium
Question: How many were Wounded in the Artillery Corps unit while having 0 off 0 men Killed?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="0 off 0 men")*(A1="artillery corps")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(C2:C7="0 off 0 men")*(A2:A7="artillery corps")),4))
Level: medium