For every employee in the company compute the cost of their reporting line — the total salary of their direct and indirect reports at any depth (the employee themselves is not included). Employees with no reports get an empty value. Show the employee id, name, and the sum, sort by id. Subtle point: if someone has reports but they all earn zero, the sum should be zero, not empty — distinguish «no reports at all» from «reports exist and their salary sum equals zero».