It doesn't work. Maybe i'm missing something but i think i have done everything right. I uploaded the file you attached at the WA ecart folder and the total cost is rounded again. Also, it didn't correct the other issue with the cart update. Do you think it would be a good idea to send you the files with the delete checkbox that doesn't work, the cart definition file and the store cart file? So you can check them and provide a solution? If you think so, i have already attached them. I'm really in a dead-end here and the client's pushing for project delivery.