The Following Data Relate to a Company That Produces and Sells

The following data relate to a company that produces and sells a travel guide that is updated monthly:
$\begin{array} { | l | r | } \hline \text { Fixed costs: } & \\\hline \text { Copy editing } & \$ 6,000 \\\hline \text { Art work } & \$ 2,000 \\\hline \text { Typesetting } & \$ 72,000 \\\hline\end{array}$
$\begin{array} { | l | l | } \hline \text { Variable costs: } & \\\hline \text { Printing and binding } & \$ 3.20 \text { per copy } \\\hline \text { Bookstore discounts } & \$ 4.00 \text { per copy } \\\hline \text { Salespersons' commissions } & \$ 0.50 \text { per copy } \\\hline \text { Author's royalties } & \$ 2.00 \text { per copy }\\\hline \end{array}$ Each book sells for $20.00. The company sold 8,000 books in June and 10,000 books in July.




-What is the degree of operating leverage for July?

A) The same as that for June.
B) Higher than that for June.
C) Lower than that for June.
D) Not determinable.