Omega Company adjusted and amended its books at the end of 2019. In reviewing the records, some information is confirmed.

a. Omega has failed to accrue sales commissions payable at the end of the last 2 years, as follows:

December 31, 2018 $32,000

December 31, 2019 $20,000

b. In reviewing the December 31, 2019 ending inventory, Omega discovered errors in its inventory-taking procedures that have caused inventories for the last 3 years to be wrong as follows:

December 31, 2017 understated $128,000

December 31, 2018 understated $152,000

December 31, 2019 overstated $53,800

Omega has already made an entry that established the wrong December 31, 2019, inventory amount.

c. On 31 December, 2019, Omega decided to change the depreciation method on office equipment from double-declining-balance to straight-line. The equipment has a cost of $960,000 when bought on January 1, 2017. It has a 10-year useful life and no residual value. Depreciation expense recorded prior to 2019 under the double-declining-balance method is $288,000. Omega has already recorded 2019 depreciation expense of $102,800 using the double-declining-balance method.

Required:

i. Compute and journalize the accounting entries required on December 31, 2019, to record the above 3 situations of corrections and changes. The books are still open for 2019. The income tax rate is 40%. Omega has not yet recorded its 2019 income tax expense and payable amounts, so current-year tax effects may be ignored.

ii. Are the changes of depreciation treatment in situation c. due to accounting errors? Explain the situation.