Fitness Fanatics is a regional chain of health clubs that evaluates its club managers based on return on investment $($ROI$).$ The company's Springfield Club reported the following results for the past year:

Sales $ $840,000$

Net operating income $ $24,360$

Average operating assets $ $100,000$

The following questions are to be considered independently.

Required:

$1.$ Compute the Springfield club$$s return on investment $($ROI$)$