[Demo] Blue Flower | Purchase Limit Based on Total Flower Points Being a Multiple of 4

Product Description

This product is a demo item that implements a quantity restriction, allowing purchase only when the total number of items selected in the "cart" is a multiple of 4.

Flowers in the store can only be purchased in total quantities that are multiples of 4 (such as 4, 8, 12, etc.). If you attempt to purchase a total of 3, 5, 2, or any other non-multiple of 4, an alert message will be displayed on the checkout page, preventing the purchase.