Answer :
Okay so there are 8 people total working on the bags and it takes 2 minutes per bag. That means in two minutes, 8 bags get done. Or in other words, to make it simplier, 4 bags in one minute. 1200/4 = 300. It will take 300 minutes with all of jess and her friends working together to make 1200 bags. 300/60 is 5. It will take 5 hours (converting minutes to hours) for Jess and her friends to finish 1200 bags, each person taking 2 minutes per bag.