Table:
0
A
B
C
D
E
F
1
Callsign
Area served
Frequency
Band
Freq currently
Purpose
2
5AL
Alice Springs
1530
AM
8AL (783 kHz)
National
3
5DR
Darwin
1500
AM
see 8DR
National
4
8DN
Darwin
1242
AM
8TAB (HPON)
Commercial
5
8DR
Darwin
0 657
AM
8RN
National
6
8KN
Katherine
0 639
AM
8RN
National
7
8TC
Tennant Creek
0 684
AM
8RN
National

Questions and formulas:
Question: What is the frequency for katherine?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="katherine"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,B2:B7="katherine"),3))
Level: medium
Question: Which band has a current freq of 8tab (hpon)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="8tab (hpon)"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,E2:E7="8tab (hpon)"),4))
Level: medium
Question: Which freq currently has 0 657?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="0 657"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,C2:C7="0 657"),5))
Level: medium
Question: What is the purpose for the katherine freq of 8rn?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(E1="8rn")*(B1="katherine")),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,(E2:E7="8rn")*(B2:B7="katherine")),6))
Level: medium
Question: Which freq currently has 0 684?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="0 684"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,C2:C7="0 684"),5))
Level: medium
Question: Which band serves darwin for commercial purpose?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(B1="darwin")*(F1="commercial")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,(B2:B7="darwin")*(F2:F7="commercial")),4))
Level: medium