please solve this as soon as possible

Revenue (net sales) $75,478,221

Cost of sales $52,227,004

Gross margin $23,251,217

Research & development expenses $2,158,677

Selling, general, and admin expenses $8,726,696

Operating income $12,365,844

Interest expense $363,000

Interest and dividend revenue $43,533

Royalty revenue $420,010

Income before income tax $ Taxes $4,986,555

Net income $

The average total assets is $36,236,065 calculate the following ratios

1- ROI

2- Assets turnover

3- Net margin

4- What is the percentage of COST OF GOODS SOLD, OPERATING INCOME, AND THE NET INCOME from the net sales