The Nestl Group, the Swiss chocolate company, sells many other food items in addition to various types

The Nestlé Group, the Swiss chocolate company, sells many other food items in addition to various types of chocolates. Sales in 2011 were CHF83,642 million (where CHF means Swiss francs), cost of goods sold was CHF44,127 million, net income was CHF9,487 million, average common stockholders’ equity was CHF60,436 million, and average total assets were CHF112,866 million. Compute Nestlé’s gross profit percentage, return on sales, return on average common stockholders’ equity, and return on average total assets.