Modify a Shipment plugin for WooCommerce to implement multiple Shipment based on its Class

We have a Custom Plugin which implements certain conditions based on Shipping Class, Shipping Weight, Dimensions and Price. But we forgot to implement a small condition in the past which we want to do it now. If a cart contains, multiple shipping classes, the shipping methods must be split according to class. The tricky part is we need to keep the shipment conditions valid for all the shipping classes which are implemented based on price, dimensions and weight etc. Also the Cart Total is calculating along with Taxes and Shipping Charge for giving discount. (We have certain conditions based on Cart Subtotal). Also need to fix this. Please bid only if you think you can do it. Will pay $100CAD and need to finish in a day.