Journalize the following transactions for Donnell Inc. using both the periodic inventory system and the perpetual inventory system, presented in a side-by-side format shown at the end of this exercise.
Oct. 5 Purchased $30,000 of merchandise from Rex on account, terms 2/10, n/30.
Oct. 8 Returned merchandise purchased on account on Oct. 5 amounting to $500.
Oct. 15 Paid for purchase of Oct. 5, less Oct. 8 return and purchase discount.