Contracts are at the center of the application. Around contracts Quotations, Orders and Invoices are generated.
The attributes that define contracts are: a name, a price, a default VAT and optional it could have a picture because what better description than a picture you can have for a contract and a text description.
Catalog checkbox and catalog description are used for a special list of contracts.
The listview is an overview of the contacts where you have the basic functions like add and delete for managing the list.