In the context of the problem, the sum of $16.80 represents the amount of money Siri has remaining after earning $56.80 at his job and spending $40 on a video game.
The sum of $16.80 in the context of the problem represents the amount of money that Siri had remaining after spending $40 on a video game. This means that Siri had $16.80 left from the $56.80 earned at their job last week.
