Required information

[The following information applies to the questions displayed below.] Megamart, a retailer of consumer goods, provides the following information on two of its departments (each considered an investment center).

Investment Center	Sales			Income			Average Invested Assets
Electronics	$	40,000,000		$	2,880,000		$	16,000,000
Sporting goods		20,000,000			2,040,000			12,000,000

Compute profit margin and investment turnover for each department. Which department generates the most net income per dollar of sales? Which department is most efficient at generating sales from average invested assets?