Here are my suggestions:
"Bill(ing) UOM (unit of measure) Fctr (Factor) Den(ominator)"
jmenovatel koeficientu MJ (mìrné jednotky) fakturace
[I assume there is some sort of a formula to calculate the billing
"Adj. LP (linear programming) Inventory Level"
optimalizovaný stav zásob na základì lineárního programování
[linear programming is a mathematical method used for a number of
business application including, I believe, inventory management]
"Free Above Target Non-Stock"
volný nadmìrný stav neskladových zásob
[this is a real stretch
`free' may mean not earmarked for a specific
purpose/job/order; `above target' may refer to exceeding a
planned/eacpected quantity; `non-stock' refers to items in the
warehouse which are not meant for sale to customers such as office
supplies or "phantom items" such as subassemblies which are only used
as a part of a final product but are not sold to customers since
these subassemblies are in the warehouse, there must be a way to
account for them but by marking them `non-stock' it is clear no
customer may order them]
I hope this gives you some starting points for further research.