Creation of a plugin "Types of fabrics" for the online store

Hello, there! You need to create a fabric selection plugin for the online store Testo nascosto. The management system of the online store Shop Script 5. It is necessary to add, the possibility of adding to some goods: "selection of types of fabrics". Here is an example of a page: Testo nascosto Which has the following inscription: "Select fabric from the catalog". Buyers are given the opportunity to choose a fabric, which changes the price of the goods themselves. The same thing should be done in our online store.