The printing charge of flat-bottom bags is different from that of other bag types. Generally, this kind of bag needs to charge 2 sets of copper plate fees, for example, front + back + bottom is a set of fees. If printing 2 colors, it will be charged for 2 copper plates, and two sides gusset will be charged for 1 set copper plate, for example, printing 1 color is charged for 1 copper plate. So the total is 3 copper plates. The quotation is based on your size. Welcome to contact our sales team, they will answer your questions online.