Earth Oil owned the following unproved property at 12/31/55:

• Significant Leases:
   Lease A: $350,000, Impairment: $130,000
   Lease B: $500,000, Impairment: $160,000
• Insignificant Leases:
   Lease C: $50,000
   Lease D: $30,000
   Lease E: $28,000
   Lease F: $18,000
   Total Cost: $126,000, Total Impairment: $45,000

Requirement:
 Prepare journal entries for 2056, assuming the following events:
 a. Lease A was sold for $360,000.
 
 b. Lease B was impaired by an additional $15,000.
 c. Proved reserves were found on Lease C and Lease E.