Jupiter Energy owned the following unproved property at 12/31/29:

• Significant Leases:
   Lease A: $360,000, Impairment: $150,000
   Lease B: $520,000, Impairment: $170,000
• Insignificant Leases:
   Lease C: $55,000
   Lease D: $35,000
   Lease E: $30,000
   Lease F: $20,000
   Total Cost: $140,000, Total Impairment: $50,000

Requirement:
 Prepare journal entries for 2030, assuming the following events:
 a. Lease A was fully impaired.
 b. Lease B was sold for $480,000.
 c. Proved reserves were found on Lease E and Lease F.