Table: shelftags

    id int
    upc int or varchar, dbms dependent
    description varchar
    normal_price dbms currency
    brand varchar
    sku varchar
    size varchar
    units int
    vendor varchar
    pricePerUnit varchar
    count int 

Depends on:

Data for generating shelf tag PDFs. id is used 
to segment sets into different PDF documents.
An id maps to a buyer at WFC, but doesn't have to.

Size relates to an indivdual product.
Units relates to a case. So a case of beer has 24
units, each with a size of 12 oz.

Count is used to print multiples of the same tag