Please refer to the below ,suggested reports for your requested details.

1. Landed cost report for all the stock in single opinion.
Report name :- Part purchase statement.
Navigation :- Parts >>> Reports >>> Procurement >>> Statement >>> Part Purchase Statement

2. Detailed stock report in all branches included
Report name :- Stock Position As On
Parts >>> Reports >>> Inventory >>> Stock >>> Stock Position As On

3. Separate stock report of all branches
Report name :- Stock Position As On
Parts >>> Reports >>> Inventory >>> Stock >>> Stock Position As On

Note :- Branch wise filters are available in all the above mentioned report.
Requesting you kindly apply appropriate filters and generate required data