Explain all the elements in determining a LTL freight charge/bill to a shipper under the class rate system for a given freight lane. List out all the key elements with an explanation for each element. Make sure to include how the class is determined, but also the other elements in determining the actual rate and final charges over and above just the class determination. Use the book, videos, and PP's to explain this in as much depth as you can. Show me everything you know about this in good detail.