@machop66 if all items in a listing are the same with the same selling price, then when the listing is created or revised, put the number of items into the appropriate box.
ie all baseball caps are black and the same size and same style
if all items are similar and have a variation to them, you need to create a variation listing, which can also have different selling prices.
ie baseball caps are different colors, sizes, logo, etc
as far as shipping prices, there will be a box for how much to charge for each extra item over the first item
