I have a Shopify Website that we hired a company to complete for us. We sell 15 items

General information for the website: We want to launch but can't due to few delays we need help with Kind of development: Customization of existing website Description of requirements/features: I have a Shopify Website that we hired a company to complete for us. We sell 15 items and they are big-ticket cost items. The items come from Shanghai Port to Vancouver Port in Canada. The tricky situation is that we must give an estimate for shipping, which will include duty fees too. Shipping from Shanghai to Vancouver varies from $500-$3000, depending on the product. We then must offer the shipping from the Vancouver Port to the customers’ home in either Canada or the U.S. The website is set up that a customer can place their yurt in the shopping cart and order (and pay). We want to set it up so they can place 30% down, with the remainder at shipping. We have the BOLD app set up for orders. We also have NET PARCEL app set up, thinking we can at least get the quote for shipping from Vancouver port to U.S. or Canada destination address. We also need to install a banner for a lending company on our website. We need to figure out how to do different options at checkout – 30% down and remainder after. (Should we have full price, 30% price and 70% price for each item?) 3 different selections? I need to work with someone who is familiar with all these different situations I have. Look forward to hearing from you!!! Extra notes: