9514 1404 393
Answer:
 4,556
Step-by-step explanation:
Revenue from the sale of n books is ...
 R = 24.25n
Production cost for n books is ...
 C = 53533 +12.50n
These are equal for ...
 24.25n = 53533 +12.50n
 11.75n = 53533
 n = 53533/11.75 = 4556
The publisher must produce 4556 books so sales will equal production cost.