Determine the value in one field based on the value from another field (both fields are using Custom List)

Anyone knows how to determine the value in one field based on the value from another field, and infact, both of these fields are using Custom List. For instance, each meal from a restaurant has a corresponding selling price, I would like to match them correctly.

Sequantial in Custom List is a possible solution, but I would like it to be more random. SOS.

Here are a couple of examples that show how to use Custom Lists.

Custom Lists, random
https://mockaroo.com/b4fa63a0

This uses a dataset-
https://mockaroo.com/ca93fbb0