Table:
0
A
B
C
D
1
product category code
product category description
unit of measure
reference product categories
2
Herbs
Herbs
Handful             
3
Seeds
Seeds
Weight - pound,kilo.
4
Spices
Spices
Weight - pound,kilo.

Questions and formulas:
Question: What is the unit of measuerment of the product category code "Herbs"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:D1,A1="herbs"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:D4,A2:A4="herbs"),3))
Level: medium
Question: What is the unit of measuerment of the product category code "Herbs"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:D1,A1="herbs"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:D4,A2:A4="herbs"),3))
Level: medium
Question: Find the product category description of the product category with code "Spices".
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:D1,A1="spices"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:D4,A2:A4="spices"),2))
Level: medium
Question: What is the description of the product category with the code 'Spices'?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:D1,A1="spices"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:D4,A2:A4="spices"),2))
Level: medium