Please help me, how to calculate these depreciation for individual tax return?

1.On March 20, Phillip moved his business out of the old offices at 1103 Allium Lane into a newly constructed and equipped office on Grove Street. Phillip sold the old office building and all its furnishings. Phillip's expenditures for the new office building are as follows:

Date Acquired Asset Cost

3/20

Land

$300,000

3/20

Office building

2,500,000

3/20

Furniture

200,000

4/1

Computer system

350,000

6/1

Artwork

150,000