Formula Method with NBV gives wrong depreciation amount calculation

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Formula Method with NBV gives wrong depreciation amount calculation

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Hi Experts,

I have an asset cost $237483.76 and Reserve $13211.51 i.e. NBV = $224,272.25. Considering remaining life = 56 months the value  should have been $4,004.86.

Seems like when i use the Formula method with NBV and depreciable basis rule as "User Transaction Period Basis". NBV is not considered for calculating the depreciation, Oracle is considering the asset cost. Is this the expected behaviour. Pls suggest