1.   A commonly proposed and reasonably workable alternative to constant per unit prices is the two-part tariff structure.

2.   The result is that the unit price becomes even higher as publishers protect their desired profit Margin.

3.   The unit prices are published daily in the form of an offer-bid spread.

4.   However, the unit price at any time is a function of the prevailing interest rates and the risk associated with the corporation or government which issued the security.

5.   Analyst Joseph Phillippi at UBS Warburg said the challenge for Superior will be maintaining its profit margins since vehicle manufacturers are always lobbying for lower unit prices.

6.   And the notion that buying in quantity means lower unit prices -- a staple practice in the developed world -- has yet to take hold.

7.   By historical standards, unit prices are currently high.

8.   Despite the claims, their unit prices are often no lower than those on standard-size packages.

9.   It may take a lot longer to shop when you check the unit prices, but you can certainly save money.

10.   Now the unit price has plunged, and it appears possible that the entire deal will be canceled.