Need some work done on my existing 3dcart store

Hello. I need some simple work done on my 3dcart ecommerce store. I have some new items I need added to the website. need someone who is very familiar with 3dcart and knows how to set up a product with multi variations, set up the pricing correctly on the child options, as well as the pricing and cost for the children, Also need to check my website against another site to make sure my inventory levels are accurate. Need some pricing fixes as well for the items on the site. Please only reply if you have experience working on 3dcart and provide some detail on that experience.