I am importing a spreadsheet with two columns; ID and Code number.
I want to convert these into readable text. Each combination (about 90
potential combinations) of ID and Code renders unique text. What is the best
way to convert the data? Should I use a function, read another table, etc.

For example:

ID Code Company Part Combined
10 100 ACME widget ACME widget
10 200 ACME cog ACME cog
10 300 ACME sprocket ACME sprocket
20 100 Bell Mfg wrench Bell Mfg wrench
20 400 Bell Mfg cog Bell Mfg cog
30 600 Zebra Dist bucket Zebra Dist bucket