6. Essex Corporation manufactures machinery used in the production and packaging of food products. In analyzing Essex Corporations financial statement information for 2019, the following key accounting information was noted:

Income Statement	2019
Sales	$7,650,400
Cost of Goods Sold	$5,280,000
Gross Margin	$2,370,400
Selling, General and Administrative Expenses	$1,530,400
Operating Income	$840,000
Balance Sheet
Operating Assets	$4,565,000

Required:

1. Compute Essex Corporations margin for 2019
2. Compute Essex Corporations turnover for 2019
3. Compute Essex Corporations return on investment for 2019
4. Recompute Essex Corporations return on investment if sales increase from $7,650,400 to $7,800,000, thereby resulting in an increase in operating income from $840,000 to $880,000.