Moral Dilemma - Receiving incorrect change Literature & Language Essay

Reaction Paper: You can take references from Chaffee: Thinking Critically about Moral Issues - Chapter 9 only
This is what I have so far:
Moral Dilemma:
I remember it was the Saturday morning before Christmas and my husband and I were food shopping for the holiday and for the week. We hadn’t gone in almost 2 weeks, so we had 2 wagons to push around, going up and down every aisle. As quickly as my husband put the items on the conveyer belt, I was packing them into the bags. After all the items were accounted for, and the coupons were applied, the grand total of the purchases was announced. As my husband paid cash (this doesn’t happen too often especially with a very large purchase), the cashier gave back the change to my husband. My husband looked a little perplexed, but he quickly placed the change in his pocket, handed me the printed coupons, and we proceeded to walk away. Before leaving the store, he told me he doesn’t think he received the correct change. I asked him to step aside and look at the receipt a little bit closer. Upon checking, we noticed the cashier gave him $20 extra.
My husband and I didn’t think twice about keeping the extra money; it would be immoral to keep it. Honesty is very important even if no one will know or ever find out. More people should extend honesty to each other. It can inspire and motivate you, and will make you feel better about yourself. We also wouldn’t want to jeopardize the cashier on losing her job or have the difference taken out of her paycheck.
People never think about the possible consequences of their actions, even though something that seems so small can have a large repercussion.
Format: Interpretation Introduction to the paper, introducing thesis and topic.
Analysis and Presentation of my Argument - giving a full analysis of the situation and present a strong argument.
Evaluation: To critically examine the facts or arguments. Give examples. You can also present the other side of the argument if you choose and tell which side you believe would be strongest. Can give citations and a reference or Works Cited in MLA.
Summarize - Summarize my thoughts.