Answer: 5 hours
Explanation:
Given : Time taken by each person to prepare one bag = 2 minutes
Total people : 6 [ Ashley and 5 friends]
Total bags to prepare =900
If each person is making equal number of bags, then the number of bags each person make :-

Now, time taken by each people to make 150 bags :-

Since 1 hour = 60 minutes

Then ,

Hence, it will take 5 hours to prepare 900 bags of samples if Ashley and 5 of her friends do the work.