The following information is available on Company A:

Sales $$900,000$

Operating Income $$36,000$

Shareholders' Equity $$100,000$

Average Operating Assets $$180,000$

Minimum Required Rate of Return $15\%$

What is Company A$\text{'}$s residual income?

Multiple Choice

$$9,000$

$$21,000$

$$24,000$

$$45,000$