Answer:
sales revenue 29,000 debit
     income summary   29,000 credit
income sumamry  10,520 debit
  operating expenses 6,200 credit
  income tax expense 4,320 credit
income summary 18,480 debit
    retained earnings   18,480 credit
Explanation:
To close the temporary account we will use an auxiliar account called income summary.
We will post expense in the credit against income summary in the debit
for revenues we will do the other way around, debit aainst income summary on credit.
Last, we transfer the balcne of this account into retained earnigns.
balance of retained earnings:
29,000 Â - 10,520 = 18,480