The conflict of this passage is since Jason got invited to Percy's birthday party so instead of him buying the book for himself he had buy it for this friend Percy because he didn't want to let him down.
Hope this answer your question:)
The position of a topic sentence can be placed at the beginning of the paragraph, which forms a deductive order (Main topic then down to the supporting details). It can also be placed at the end of the paragraph, which forms an inductive order (supporting details before the main topic). But a topic sentence should never be placed in the MIDDLE of the paragraph.
Self discipline: The ability to control your own feelings and overcome your own weaknesses. The ability to pursue what you think is right despite temptation to abandon it.
Self control: The ability to control yourself, your emotions, behavior, and desires particularly.
Both of these are super important in many situations. In school, it is important to have self-control to respect the people around you. If you were to disregard self discipline and self-control, you would be doing whatever you wanted and getting in trouble. The same thing applies to life situations. If you disregarded self discipline and self-control in a mall or in a bank or while driving, you could do a lot of things that you would probably regret later. Self control and discipline are such important skills to have. They essentially show how tough a person can be to restrain themselves in some hard situations, and stay cool even in heated situations.
I hope this helps you :)