I am creating a webshop of electrical devices and want to put a cable to the store. I would like to create a cable product and to show that the price of that is 0.5 EUR / item. The length of one item is 1 m. How can I set up, that the customer would be able to order minimum 500 items per order? It means that the minimum order quantity would be 500 m of cable. So the customer can put 501 pieces, or 502 pieces or 9999999 pieces into his/her basket, but cannot put 499 or less pieces. So what is the solution for this?