'Rate By Weight' shipping in Wix

Hi,
This is common business sense… I need to charge shipping for heavy weight items on my Wix store, but I’m willing to absorb the shipping, provided the order meets a certain subtotal and minimum weight. Somehow I’m not able to do that in Wix. The contact centre confirmed its not possible right now. Seems odd that there would be no way to do this. Below is the rule, I would like to setup. Any ideas are welcome. Thanks

For all customers in a certain region,
IF the total weight of the cart is less than 5 Kgs AND the subtotal of the Cart is greater than 99.99, the shipping amount must be 0
ELSEIF the total weight of the cart is less than 5 Kgs AND the subtotal of the Cart is less than 99.99, the shipping amount must be $15
ELSEIF the total weight of the cart is between 5-10 Kgs, the shipping amount must be $17
ELSEIF the total weight of the cart is between 10-15 Kgs, the shipping amount must be $20
ELSEIF the total weight of the cart is greater than 15 Kgs, the shipping amount must be $25

Product:
Wix Studio, Dashboard

You might be able to do this using the Wix eCommerce Additional Fees Service Plugin. However, this will require custom code.