ECommerce site ASAP

General information for the website: Online Parcel Delivery
Kind of development: Customization of existing website
Description of every page/module: The homepage should have a "Quick Quote" function allowing customers to Enter Collection address, Destination and Weight and quotes from the various companies we work with should be visible. The details of pricing can be available in any format, currently its a lot of pages of .csv which can be entered by me in any way the developer needs.
Description of requirements/features: Once the customer chooses the quote they wish to proceed with the next page should contain details to be filled in like Full address, Personal details and dimensions and weight of packages. The next page should give a final price and a buy button.
Extra services needed: Customization, 3rd party integration
Extra notes: I am currently using Shopify and the site is in the process of adding detail, Its basic and I am open to options.