Answer:
Option A. $19.98
Explanation:
Fra Diavolo's Books marked down its entire stock of novels for the weekened only = 60%
After marked down the sale price of the book = $11.99
On Monday morning when sale goes off,
The price will return = 11.99 รท 0.60 = $19.98
To calculate the original price before discount we have to divide 11.99 to 60%.
So Option A. $19.98 is the answer.