I need help with the following depreciation:

Commercial building 39 years depreciation straight line for tax purposes:

ACQUIRED: 10/1/2017 COST: 106,704

I need to know how to calculate the depreciation for 2017.

I have the depreciation for 2018,2019, and 2020 = 106,704/39 = 2,736 per year x 3 = 8,208, to this amount, I have to add the portion for 2017. The number I was given 2017,2018,2019, and 2020 was 8,776. How do I get the correct number

I have the depreciation for 2021 which is 2,736

Thank you