It is a good thing that I use a calculator when I am doing the math in my checkbook

(Chapter 6 Living with a Memory Impairment in my book)

*I even carried a one here.

Today I added this in my checkbook: $334.12

+$138.15

$522.27

Luckily, I checked it with my calculator and I got the correct answer $472.27. I'm not sure how I got this total but I'm glad that I checked it with the calculator. I think that I should have been able to add this correctly. I'm not sure why this happened.