Units of Production depreciation method

Company purchased machinery for original cost of 15 000 euro.

Estimated residual Value is 1000, estimated usage 100 000 units.

Below you can see how many units this fixed assed producing early.

* 1 Year 25000 units

* 2 Year 5500 units

* 3 Year 25000 units

* 4 Year 15000 units

* 5 Year 29500 units

What is the total depreciation expenses of the first three years?