Formatting Report Output on an APEX Page
If you choose the format of the output region that displays your customer's book sale results, you can use the entire universe of HTML tags and formats (specifically the ones related to fonts, in your situation) to enhance your output.
The APEX Page Design
Using an HTML enabled page region, anything you put under the HTML source definition will be interpreted and displayed as the HTML code indicates.
The Page Display Output
This is how the above design looks. As requested, the example shows how an HTML tag can create the RED color effect for the PRICE value of the book.
There are a number of ways to determine the current value of each book property (TITLE, QUANTITY, LANGUAGE, etc.)