Extracted Product Group -> Group_type to a a new object called Sale Category.
Moved tax from product to Sale Category for uniform taxes on types of sales.
rename the product group table to either product category or menu category
move the group_type field from productgroup to products and name it sales category eg. Food, beverage, etc. also, set the tax for sales category and not individual product
Added the printers permission to end of permissions and only for owner, set them right
