Adding an item

I need to use web services to add an Item (Inventory Item for example), and I am struggling to figure out how to get the pricing part to work - I have been able to easily add the item itself. Is there any sample code showing how to add an item, including pricing?

From the documentation, it appears Pricing Matrix has attributes of currency, priceLevel, discount, priceList, however when I look at it with Object Browser I only see a pricing property. I am not sure how I am supposed to use Price Matrix and price list to add an item (with pricing) using web services - a description of the correct procedure, or an example would be greatly appreciated.