Minimum Order Quantities for Multiple Products with the Same Design

We often have orders with several different products with the same design. An example would be a school that orders 50 tshirts and also 15 sweatshirts, all having the same design & print.

We currently have our minimum set to 24, but that doesn’t take into account both products that have the same design. The two line items on the quote get counted separately towards the minimum, and in this example should be counted towards the same minimum.