A company lost $400$ hours due to accidents on the job in the fourth quarter of its fiscal year. The labor rate of the employees who actually missed time at work is $$21\mathrm{.}8$ per hour. What is the unproductive cost to this company?

Group of answer choices

$$8,320$;

$$8,420$;

$$8,520$;

$$8,620$;

None of above.