error of reversal of entries error of omission calculation error error of principle Ben was adding up the total sales for the day. He committed an error in addition. Cynthia received $500 cash from her debtor. She debited the amount in the cash account instead of crediting it. Darryl overlooked an amount of $250, which he paid as transport expenses. Erica bought a secondhand van for her business. She entered this as a transport expense instead of recording it as an asset for the business.