Low-level-code in cost run

Hi All,

I'm setting up a cost run. I remember in the past we had a discussion to exclude low-level-code BLANK (not zero).

I've learned how the low-level-code is calculated from explosion level. Probably the cost run works thru the low-level-codes starting with the highest number to ensure cost is calculated from the bottom up to the finished product. Am I right?

But what materials do have low-level-code BLANK (" ")?

Thanks

Exberliner