Refinement of the functionality of the online store on wordpress

Heres what you need to do:
1. Add a calculation of the cost of delivery
2. Adjust payment methods on the site, create conditions for the minimum order amount
3. Add a unit of measure to products
4. Automate the process of forming an invoice for payment
5. Arrange unloading of goods from the main domain to subdomains

Indicate in the response what you can do from the TK and in what terms, as well as a portfolio (completed projects on wordpress and what exactly they did).

Full TOR: https://docs.google.com/document/d/1VNMmmrWJJEiyV0Qw9zmGlswVlfp9YfQRjOBsi4YKfI4/edit#heading=h.b7puqvcg8tq6
In the attachment, the invoice template in pdf on the basis of which you need to create an upload of a personal account for the client - the fields that can be changed are marked in red, the data there should be pulled up from the fields that the client will fill out when placing an order.