The table below shows how total donations, average donations, total labor costs and average labor costs vary depending on the number of employees State U hires for its fundraising activities.The total labor cost with 4 employees is:

The table below shows how total donations, average donations, total labor costs and average labor costs vary depending on the number of employees State U hires for its fundraising activities.The total labor cost with 4 employees is:
A.$38,000.
B.$43,121.
C.$21,500.
D.$22,000.
正确答案：$38,000.