Minimum purchase & Preorder

We require two different types of minimum quantity rules for our B2B customers:

Rule #1: For our "Portwest" brand collection.

A customer must purchase a minimum of 12 items from this collection to check out. This minimum can be met in two ways:

a) Buying 12 units of a single product (e.g., 12 jackets).

OR

b) Buying a combined total of 12 units from different products within the "Portwest" collection (e.g., 5 jackets + 7 pants).

Rule #2: For our "HexArmor gloves" products.

For this specific product line, the minimum order quantity is higher: 36 pairs.

To summarize, we need to enforce minimum order quantities that can be based on a collection of products (Rule #1), and these rules need to be different depending on the product line (Rule #2).