Final answer:
The total cost of the digital version of a book can be found by subtracting 12 dollars from the hardcover price, dividing the cost of the paperback version by 2, and adding the finance charge of 1/10 of the hardcover price.
Step-by-step explanation:
The total cost of the digital version of a book can be found using the given information. The hardcover version sells for h dollars, the paperback version sells for 12 dollars less than the hardcover version, and the digital version sells for half the price of the paperback copy.
To find the cost of the paperback version, subtract 12 dollars from the hardcover price: h - 12 dollars. Then, to find the cost of the digital version, divide the cost of the paperback version by 2: (h - 12) / 2 dollars.
Finally, the website adds a finance charge equal to 1/10 of the price of the hardcover version to all purchases. So, the total cost of the digital version, including the finance charge, is [(h - 12) / 2] + (1/10)h dollars.