The management expenses of general listed companies include: staff salaries, research and development expenses, office expenses, etc.
Other sales expenses include: advertising fees, etc.
However, companies are different from companies. Some companies have clear goals, and the amount of R&D expenses is clearly listed in the notes. Some companies only list management expenses. The note briefly introduces the increase and decrease of R&D expenses. The landlord can't see that the research and development expenses should be very calm. .