How does Table based method perform depreciation calculation ?

Hi All,

We have a customization requirement in FA. But before that, we need to know how table based depreciation method actually calculates. I will be very happy if anyone can help with formula for this. Please find below, example values...

Corporate book

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Cost = 3115.51

Method = STL

Life = 3 years (36 months)

As per this we understand that monthly depreciation amount populating = Cost / Life = 3115.51 / 36 = 86.54

We are good with this. However, unable to understand the calculation for Tax book

Tax Book (we have 2 tax books)

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Cost = 3115.51

Method = MACRS 50B HY

Life  = 5 years (60 months)

Depreciation amount for first month is shown as = 155.78 (How ??... - we are stuck here)