A family friend has asked your help in analyzing the operations of three anonymous companies operating in the same service sector industry. Supply the missing data in the table below:(Loss amounts should be indicated by a minus sign. Enter your ROI and Rate of Return Percentage answers to the nearest percentage (i.e., 0.12 should be entered as 12).)

Sales $530,000

Net operating income $24,840

Average operating assets $154,000

Return on investment (ROI)-??

Minimum Required Rate of return:

Percentage 12%

Dollar amount $18,480

Residual income $6,000

I have found everything on this answer but the ROI. Could you show me how to get that based off the other answers I have found?