Recording Entries Using the Full-Cost and Successful-Efforts Methods In 2020, Star Oil Co. incurred exploration costs related to exploring and drilling for oil. Costs were allocated to 5 drilling areas: Area 1: $90,000, Area 2: $45,000, Area 3: $27,000, Area 4: $126,000, Area 5: $81,000. Of the 5 areas explored, Areas 2, 4, and 5 have successfully resulted in discovery of recoverable oil reserves while Areas 1 and 3 have been abandoned. The estimated value of the oil discovered in the successful drilling areas is $2,700,000. a. Record the entry for exploration costs using the successful-efforts method. Note: Record your debit accounts in alphabetical order using the first letter of the account name. Account Name Dr. - cr. b. Record the entry for exploration costs using the full-cost method. Account Name Dr. cr