interview

My group went to some seafood store this morning and we interviewed some employees about the influence of fakes.
At first, I expected the employees would say that the fakes made their business worse and less customers. But in the interview, they said the customers would still choosing their goods although the fakes are cheaper because they have better reputation. Some of them have worked for 40 years already.
Once, we saw a store that was no customers inside and so we wanted to interviewing the employees. But they refused us and said they were busy. I guess they were selling fakes and so there were no customers and didn't want to answer our question. I learnt that we should choose stores with more customers and kinder employees. And 'busy' may be an euphemism.
I think our questions are useless and so we got only a little imformation. Also, we were too early to do interview. Many shops haven't open yet. Next time, we should chose a better time and set more useful question.