Slinky Company purchased merchandise on June 10, 2021, at a price of $20,000, subject to credit terms of 2/10, 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, 2021, and July 8, 2021.