Connecting in store POS and Big Commerce Website

LOOKING FOR PROFESSIONALS WITH BIG COMMERCE AND QUICKBOOKS EXPERIENCE a)I have a small retail store and want to sell items in the store online. I ALREADY HAVE A BIG COMMERCE WEBSITE, however, have not used it yet. I need to be able to have the inventory update automatically when something is sold online or in the store so that I do not sell something in the store that has already been sold online or vice versa. I will be using Quickbooks as the POS system. b)Some time has passed since the site was designed so I will need to have a few graphics updated. Graphics will be provided by me. I need only have someone update them on the site. c)I will also need the initial load of products to be completed. I will provide the inventory and details in a spreadsheet with corresponding pictures. d) Setup Facebook ecommerce feature hosted by [login to view URL] e)Add Facebook, Twitter and YouTube links on website NOTE: Project will be paid in full once all work is done and the website is fully functional, ready for customers to buy.