Straight line YTD depreciation using posting and reporting dates

Good day

I need assistance in calculating YTD depreciation (R9) using the following factors:

* Posting date (C9)
* Useful life (I9)
* Closing balance (N9) - Total cost of item
* Date of report (E5)

The first month the item will have 0 depreciation, and if possible, could depreciation stop calculating when the Net Book Value reaches 0.

Your assistance will be much appreciated.

Thank you
Bianca