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Exercise All-9 Errors related to the Purchases Journalperpetual L06 A companyr that records credit purchases in a Purchases Journal and records purchase returns in its General Journal made the following errors. Indicate when the error should be discovered: . Made an addition error in determining the balance of a creditor's account. Made an addition error in totalling the Ofce Supplies column of the Purchases ' Journal. Posted a purchase return to the Accounts Payable account and to the creditor's ' account but did not post to the Merchandise Inventor}r account. Posted a purchase return to the Merchandise Inventoryr account and to the ' Accounts Payable account but did not post to the cred itor's account. Correctly recorded a $4,000 purchase in the Purchases Journal but posted it to the ' creditor's account as a $400 purchase