Hi Roz,
Level 16 needs to be set up with your prices.
My understanding is that your level 16 table is set to zeros because the feature was added after you installed/bought your Lifesaver. The first time you go to use a level 16, it'll pop up a box warning you that it's set to zero and ask for a manual price.
To fix the table so you don't get this message:
Main menu -> PRICE -> MATS -> right arrow until you see the level 16 price matrix and have fun
Mike
PS: This advice applies only if you have the "Use Mat Markup table" feature un-checked in the configuration screen. (and I believe you do) With mats you have the option of pricing them with the multi-level matrix, or with a markup system that allows up to 12 formulas - depending on cost. (similar to how moulding is priced)