CSV file from my Shopify store needs to be be formatted for import into Ebay Turbo Lister - repost

I have an online vintage jewelry store through Shopify and I've recently opened an Ebay Store. I want to list my inventory on my Ebay store as Buy it Now with an option to Make an Offer. I've exported my company inventory into a CSV file. There are 762 products and I need the CSV file formatted correctly so I can export into the EBAY via Auctiva (unless there is an easier way). I really need someone who has experience working with Ebay/Auctiva. If all goes well this could be an ongoing project. Please let me know how many hours you estimate to complete the work. Thanks!