Use the Following to Answer Questions: Table: Excellence Publishing -(Table: Excellence Publishing) Refer to the Table

Use the following to answer questions: Table: Excellence Publishing $$\begin{array} { | c | c | } \hline \text { Number of Workers Per Year } & \text { Number of Books Edited Per Year } \\\hline 4 & 16,000 \\\hline 5 & 19,000 \\\hline 6 & 21,200 \\\hline 7 & 22,800 \\\hline 8 & 23,700 \\\hline 9 & 24,200 \\\hline\end{array}$$
-(Table: Excellence Publishing) Refer to the table. Initially each edited book sells for $50. Suppose that there is an increase in the demand for edited books, such that each edited book now sells for $70. How many people will the company hire per year as editing staff if the salary is $47,000 per staff member?

A) 5
B) 6
C) 7
D) 8