These sets of molds may cost about 1, to 2, yuan. If you find a cheap mold manufacturer, you can make them for 8, to 9, yuan. If you can change the structure and remove the void, you can try to make several products on a set of molds without core pulling, so the mold cost will be saved. Whether the product can sit in a set of molds depends on the detailed structure of the specific product. Without specific samples or engineering drawings, it is impossible to make an accurate evaluation.