Niah works as a retail sales clerk earning $18,000 per year. She plans to go to school for medical billing that has a median salary of $35,000. The cost of her education will be $20,000. If Niah does not work for the 2 years that she is in school, about how long will it take her to recover her investment if she gets a medical billing job making the median salary when she graduates? a. less than 1 year b. 1.2 years c. 1.6 years d. 3.3 years Please select the best answer from the choices provided