Sky Petroleum owned the following unproved property at 12/31/89:

Significant Leases	Cost	Impairment	Insignificant Leases	Cost	Total Impairment
Lease A	$330,000	$120,000	Lease C	$40,000
Lease B	$470,000	$140,000	Lease D	$30,000
			Lease E	$25,000
			Lease F	$15,000
				$110,000	$44,000

Requirement:
 Prepare journal entries for 2090, assuming the following events:
 a. Lease A was sold for $340,000.
 b. Lease B was impaired by an additional $10,000.
 c. Proved reserves were found on Lease E and Lease F.