Excel Data Injection

I was wondering I want to use the excel spreadsheet to help in creating a stock market so would it be possible to use that document to injection a bunch of data like 300 + entries to help in creating a stock market and getting market price for the product the entries would be within a range. But I just wondering do I just put all the customers names in the first column then in the second column the random number?

You read that right?

also for a slightly different perspective on the same pattern: