Shortening the hem on a jersey dress
My daughter has asked me shorten a jersey dress. I have to cut off approximately six inches off the bottom of the dress. I have been sewing for over sixty years, but I have never cut this type of knit. My question is how do I cut a straight line when I'm cutting off the six inches and how do I hem it to get it even? I would appreciate any help you can give me. Also, I do not have a serger.