24) The following potential errors occurred related to a periodic inventory system: a) In 2024 , the new intern counted $21,000 of inventory we are holding on consignment b) In 2025 , at December 28 we purchased $15,000 of inventory on account that shipped FOB destination on December 30 , and arrived on January 3rd. We recorded the inventory purchase when it shipped. The intern only counted the inventory we had on hand on December 31