Warning: This is a sewing project. I don't sew well. I don't measure. I rarely use the proper stitches. I don't use a pattern. I cut too much and have second thoughts. If watching me do this will give you an ulcer or cause chest pains, stop reading. My mother tried to teach me right but I refused to listen.
If you have the stomach for it, read on.
Flip inside out and sew up the cut end.
Match your bottom seam with your side seam and sew across the triangle on each side.
I cut off the sleeves. This was a 1/2 sleeved shirt so the sleeves were a bit longer.
Sew then down. I decided to have the handles on each side.
If I do it again:
I'd make longer handles. I like these handles but it won't go over my shoulder so this is strictly a grocery tote.