As a firework retailer the goods have to be accompanied by a TREM CARD
This is made up of a standard HTML or PDF template and details are inserted into this template such as delivery address, customer name.
However the most important part is the explosive weight of the combined items.
So the Mod would have to take the weight of each item add them together and enter this into the template. We can use the weight field in the product table for this.
The template will be accessable from the order management page for printing and saving.