Recently, I got about 2000 dollars (in) tax returns. When I logged into my account and saw the money (that was) added (to my) amount, my reaction was, "I can buy something expensive." As discussed in the article, people may treat money differently simply because (of the) source of the money. The source of income is also (a) factor of violating fungibility (I never seen this word before) which affect(s) the decision about how much money (to spend in situations). I was obviously (irritated). (Because of) the source of money, I cannot spend more. Mental accounting affects me to think irrationally. If I did not know this financial concept, i would probably behave irrationally, too. I have trouble understanding what you mean sometimes, but your writing is okay!