A. Debit Income Summary $40,800; credit Expense accounts $40,800.
B. Debit Expense accounts $40,800; credit Income Summary $40,800.
C. Debit Income Summary $40,800; credit F. Mercury Capital $40,800.
D. Credit Expense accounts $40,800; debit F. Mercury, Capital $40,800.
E. Debit Expense accounts $39,000; credit F. Mercury, Capital $39,000.