The point of view that I would you as if I were one of the characters of a story is the “First person point of view”.
This point of view allows the reader to know the narrator's feelings and emotions. This is a subjective point of view as the narrator tells the events in a story through his perspective which does not mean that they are true. If an author uses this point of view, he is interested in the development of the main character's personality and actions and not in the rest of the characters.
If your including the cost of the items that were bought you still only really lost thirty dollars, but you also lost the items that were bought with the 70