Can someone explain how to do the math on this?

Question

Tax Deductions on Stolen Items:

During 2012, someone broke into Jacob's personal residence and took the following items:

Asset Adjusted Basis Fair Market Value (FMV) before Fair Market Value (FMV) after Insurance Recovery
Business computer $12,000 $10,000 $ –0– $ 7,000
Bearer bonds 30,000 25,000 –0– –0–
Silverware 7,000 20,000 –0– 18,000
Cash 8,000 8,000 –0– –0–
Jacob is an employee and used the computer 100% of the time in his employment. Although his homeowner's insurance policy paid Jacob $7,000 for the stolen computer, Jacob's employer did not reimburse Jacob for any of the remainder of his loss. Jacob's AGI for the year, before considering any of the above items, is $50,000. Determine the total deduction for the stolen items on Jacob's 2012 tax return.