(a) Prepare Journal Entries for Sales and Purchases (Without Discounts) Rob Corp is a lumber yard on Angel Island. Apr. 15 Apr. 19 May 10 May 19 Dec. 31 Sold lumber on an account to Hard Hat Construction, $520,000. The Inventory subsidiary ledger shows the cost c this merchandise was $280,000. Purchased lumber on account from LHP Company $100,000. Collected in cash the $520,000 accounts receivable from Hard Hat Construction. Paid the $100,000 owed to LHP Company Rob Corp personnel counted the inventory on hand and determined its cost to be $140,000. The accounting records, however, indicate inventory of $175,000 and a cost of goods sold of $820,000. The physical count of the inventory was observed by the company's auditors and it is considered correct. Prepare journal entries to record the above transactions and events in the accounting record of Rob Corp (the company uses a perpetual system). (Credit account titles are automatically indented when the amount is entered. Do not indent manually) Date Account Titles and Explanation (To record sales.) (To record cost of goods sold.) v v Debit Credit