Our old monthly sales

So, here's what I've got. I'm working on re-writing the specials/batches pages that we use at the Wedge. Right now the tables are a mess on an old mssql server. I want to rewrite the db and php pages, and presumably have them fit into some is4c-schema. How it works now is that the department managers first make a "monthly special" with plenty of department specific annotations. Our scanning department then imports the monthly special into a "sales batch", then merges the batch into the products table at the right time.

A) The db tables will go into is4c_op under the name Specials_{tblname}
B) The app itself should be able to export to some type of generic sales batch type application
C) The php pages should rely on some ../config.php