An invoice dated June 28 with terms of 1 / 10, EOM results in the end of the credit period on:

Question

Quizplus · Accepted Answer

The terms "1/10, EOM" mean that the customer is entitled to a 1% discount if payment is made within 10 days of the end of the month (EOM) in which the invoice is dated. 
Since the invoice is dated June 28, the end of the month (EOM) is June 30. Adding 10 days to June 30 brings us to July 10, which marks the end of the credit period. Therefore, the answer is (C) August 31.

An Invoice Dated June 28 with Terms of 1