One Member of the Maintenance Crew Who Earns a Salary

One member of the maintenance crew who earns a salary of $22,000 per year tells you that he spends 70% of his time in the plant, 20% in the administrative offices, and his remaining 10% he can't specify. Another member of the crew who earns a salary of $19,000 per year tells you that she spends 20% of her time in the plant, 60% in the administrative offices and her remaining 20% can't be specified. How much of these workers' salary expense will be charged to the administrative cost pool?

A) $15,800
B) $32,800
C) $17,000
D) $21,800