Frank Farley acquired a person use asset two years ago at a cost of $800. Three months later, Frank expended $200 to extend the asset's useful life and also make it more productive. During 2020, when the asset had a fair market value of $600, Frank converted the asset to business use. For depreciation purposes, at what basis amount will the asset convert to business use?

A. $800

B. 600

C. 1,000

D. 0

E None of the above