Split card when different products with different shipping classes are added

First I want to appreciate your amazing plugin. I face a problem in woocommerce packaging. To explain it better I describe it with an example:

Product A has Air Shipping class
Product B has Road Shipping class
product C has Possible shipping in road and air

In another word, obviously, I want to do as following: Some products like pork and meat they need to be kept frozen, so we must send them by airplane, In some cases, the weight of the product is too heavy, let’s say 20 KG, so this is not logical to send this type of product by airplane, since it is too expensive, to make the shipping fee fair enough we send them by truck. In another case, there are some products shipping them whether by airplane or truck doesn’t matter, hence the customer decides the shipping method. This the scenario: a customer orders pork which must be shipped by airplane also a 10 KG package of olive which must be shipped by truck, and the third product in his basket is a product that the shipping method is not important. For the third product, the customer chooses the truck shipping method. In a normal situation, each product’s shipping method is calculated separately, but I want to add the weight of the third product to the first product (olive package). what should I do to solve this problem?
Any help to handle this problem will be appreciated.