You are the owner and only employee of a company that writes computer software that is used by gamblers to collect sports data. Last year you earned a total revenue of $90,000. Your cost for equipment rent and supplies were 60,000. To start this business you invested an amount of your own capital that could pay you a return of $40,000 a year.

A yearly normal return for your computer software would be.

a.20,000

b.40,000

c.60,000

d.100,000