Populate One Column Based On Condition Of Two Other Columns

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Attached is the file & snap shot for the problem.

TABLE A
[table="width: 500, class: grid"]
[tr]
[td]Catagories state names devices
A4-100HP A ALT

[Code] .....

TABLE B
Catagoriesstate names devices
A4-100HP
A4-101MP
A4-102AP

[Code] ....

In above condition we want to have an automatic filling up of data in table B in column (name & device) but it should match first with state name with category codes of table B & then same with table A in order to avoid any wrong entry because in table A certain states are repeated but codes are unique so we want that filter should match two column of each table before filling data in table B.