Answer:
6.67 units of satisfaction
Explanation:
As the consumer optimize utility the graphic novel should provide utility at the same rate as the sunglasses because the last dollar spent on any good or service should match the same utility as the last dollar on all the other goods.
10 units of satisfaction over $15 --> 1 unit for every $1.50
$10 dollar / 1.5 conversion rate = 6.67 units of satisfaction
