@keith, I believe that if you look at typical P&L statements, you will see income and expenses are categorized by fairly broad descriptions. P&L statements are not meant as detailed sales analyses. Normally, a P&L statement breaks things down only as revenue from primary activities (operating income) and secondary activities (non-operating income), with no reference at all to lines of business, let alone specific products.
The focus of the P&L statement is to summarize profitability. The format will look quite similar no matter what type of business is involved. To break things down as you suggest, you should really be looking to various forms of inventory movement analyses.
However, if you are selling confections and soft drinks, inventory might not be appropriate for you at all. Inventory refers to goods purchased or manufactured and held for later sale. If all your sales are for items of food and drink, you might be better served (no pun intended) to simply list expenses for purchase of supplies and record income in the various categories you choose. You would not need to go through the inventory module at all. That will depend, to some extent, on whether you are a wholesaler or retailer and how long supplies stay around before they are sold to your end customers. Your accountant should be consulted on this. There may also be regulatory requirements to satisfy on how you report the acquisition and disposition of these items.