I am building a store that needs to be able to charge an additional delivery fee (essentially double the fee) based on the quantity of the product in the cart.
For example, One delivery truck can fit 12 cubic yards of material. If a customer orders more than 12 cubic yards than they will need to be charged an additional delivery fee because it will take two trucks to deliver the load.
Does anyone have any recommendations on the best way to set this up? Or what app to use?