Formula to save on stocks (cost and production) - Café Leather

Hello! After the bridge on October 12, the Café Leather brand launched a new way of acquiring its products and cutting investment in stocks. All of this was presented as a collaborative Crowdfunding project: Café_Lab. The project consists of involving the client in the production process. In short, what they do is decorate the increasingly popular pre-order concept. On the project website you can find the products, they are renewed every four weeks. Each product has two prices: 1. Price with 20% for "buying" in pre-order. 2. Full price once the product enters the collection. In parts, I indicate buy, with quotes, because the client may invest in this product but if more people do not, in theory, this product will not succeed. The company indicates that if the production does not go out, the money will be returned. In the event that it comes out, you will have saved 20% but you will have waited a month. At this point I was curious about the extent to which each client particip...