User defined depreciation rule for 40% Limit in Year 1 on Cost & 20 % on cost for next 3 years

Hi All,

We need to setup the depreciation rule that will take only 40% of the First year depreciation in year one ( the asset may be purchased in any month or period). 

Depreciation will be 40% in the 1st year SLM on Cost & will distribute full depreciation for remaining months in year 1. 

Then calculate the Straight Line Depreciation for remaining 3 year on 20 % each year on Cost.

Please see the example - 

Basis Cost of Asset - 12000 ; Date Pattern is 1st July 2012 to 30th June 2013.

Date of Purchase: November 2012

Rate of Depreciation :

1st Year - 40%

2nd Year - 20%

3rd Year - 20%

4th Year - 20%