Application for Android Movement and Accounting of Goods

In a nutshell about the project

There's a product somewhere.
The owner wants to sell, calls the buyer and offers to buy.
Further, the Customer Representative (Dispatcher) in the mobile application creates a new record in which prescribes the data of the seller or selects from the list of previously recorded sellers and transfers this order ...

It takes a long time to describe the whole process.
Details at a meeting or by phone