Find the Standard Deviation of the Data Summarized in the Given

Multiple Choice

Find the standard deviation of the data summarized in the given frequency distribution.
-A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. $$\begin{array}{l}\text { Salary (dollars) Employees }\\\begin{array} { r r } 5,001 - 10,000 & 19 \\10,001 - 15,000 & 14 \\15,001 - 20,000 & 12 \\20,001 - 25,000 & 16 \\25,001 - 30,000 & 19\end{array}\end{array}$$

A) $7967.5
B) $8195.1
C) $8422.8
D) $7588.1