London purchased a piece of real estate last year for $81,400. The real estate is now worth $100,000. If London needs to have a total return of 0.

London purchased a piece of real estate last year for $81,400. The real estate  is now worth $100,000. If London needs to have a total return of 0.20 during the year, then what is the dollar amount of income that she needed to  have to reach her objective?

Please provide formula too