Tan Co.'s bookkeeper has understated the opening stock amount of $870 as $780. The unadjusted gross profit for the accounting year ended 30 September 2021 are $169,150. What is the amount of corrected gross profit for the year to 30 September 2021? Question 1 options:

1) $168,970

2) $169,060

3) $169,240

4) $169,330