Slinky Company purchased merchandise on June 10, 2018, at a price of $28,000, subject to credit terms of 3/10, n/30. Slinky uses the net method for recording purchases and uses a perpetual inventory system. Required: 1. Prepare the journal entry to record the purchase. 2. & 3. Prepare the journal entries to record the appropriate payment if the entire invoice is paid on June 18, 2018 and July 8, 2018.