Fix grammaticality: On the other hand, retailers then were just in need of a system like bar code.
The,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
The first part of's answer is correct, but the second part is wrong.

• I'm not sure I understand your question. I think I'm missing something. – user252759 Jun 26 '15 at 18:51
• @user252759 I think you're right. The problem is that the problem is that the question is not about the grammar of the's answer. It's about the