Answer:
The year-end closing entries are as follows:
(a) Sales revenue A/c   Dr. $839,807
  Interest revenue A/c  Dr. $13,020
 To Income summary A/c            $852,827
(To record close of revenue account)
(b) Income summary A/c    Dr. $760,975
To Cost of Goods Sold                 $534,832 Â
To Administrative Expenses              $193,450
To Income Tax Expense                 $32,693 Â
(To record close of expenses account)
(c) Income summary a/c ($852,827 - $760,975) Â Â Dr. $91,852
To Retained earnings a/c                                $91,852
(To record close of income summary a/c)
(d) Retained earnings a/c   Dr.  $19,345
To Dividend a/c                      $19,345
(To record dividend account)