You can use our Inventory Control feature to keep track of units in stock and prevent overselling your items:
http://www.e-junkie.com/ej/help.inventory.htm
We do not track your wholesale cost for any item, just the retail price along with any discounts you may choose to offer.
All order details are saved to your E-junkie Transaction Log, which can display a basic summary of the number of sales and gross revenues for any time period and/or particular product, and you can also download any log view to a file that you can open in spreadsheet software such as Excel to perform further calculations:
http://www.e-junkie.com/ej/help.transaction-log.htm
In order to use our shopping cart and other features, you would need to use the purchase buttons we provide to sell your products online. Once you set up your products in E-junkie Seller Admin, we provide you with ready-made HTML codes for your cart buttons. You would simply copy the codes from us and paste them into the HTML source of your own Web site pages, wherever you want our buttons to appear among your own layout, text and images. Our standard cart would appear as an overlay "inside" your own page, fitting within your site's existing layout and branding.
Our system is designed to be really quite straightforward to configure and set up, and you have a fully-functional 7-day free trial period which begins as soon as you register for an E-junkie login. Our Getting Started help page is a good place to begin setting up your E-junkie service:
http://www.e-junkie.com/ej/help.sell.htm