A company spends an average of $500 for its 20 employees's salaries and an average of $100 for its 5 drivers' salaries. What is the average expenditure of the company?
Choose the correct choice from the following:
A) $360
B) $290
C) $420
D) $600
E) $240
Number of employees is 20   Their average salary is $500   Number of drivers is 5   Their average salary is $100   Total salary of the employees is 20*500=$10,000   Total salary of the drivers is  5*100= 
<gadget id="calculator"> 5*100</gadget>
<output>500</output>
$500   Total expenditure for company is 10,000+500=$10,500   Average expenditure is 10,500/20+5=$420   Answer is $420
<result>C</result>
A company spends an average of $500 for its 20 employees's salaries and an average of $100 for its 5 drivers' salaries. What is the average expenditure of the company?