title: Grouped Product with Fixed Sub-item Quantities
body: <p>I'm working on a Magento site that has a number of simple products.  There's also a "holiday package" which combines several simple products into one, at a discounted price:</p>
  
  <ul>
  <li>6 of Item A</li>
  <li>2 of Item B</li>
  <li>2 of Item C</li>
  <li>2 of Item D</li>
  </ul>
  
  <p>The "<strong>grouped</strong>" product type is pretty close to what I need - it allows each item to keep track of it's own stock, and when it comes time to ship and estimate packages, it tries to pack the containers using the weight/volume of each individual item.  (<strong>This shipping aspect is very important</strong>, as we need to pack the boxes as efficiently as possible - using a simple product with an estimated size for all items may not work).</p>
  
  <p>However, we do <strong>not</strong> want the customer to be able to choose the quantity of each item.  The customer should instead be asked to choose how many holiday packages they would like.</p>
  
  <p>Is a grouped product the best approach?  Is there a better way to handle this?</p>