Profitability Ratios The Nestl Group, the Swiss chocolate company, sells many other food items in addition to various types of chocolates. Sales in 2001 were SF 89,160 million (where SF means Swiss francs), cost of goods sold was SF 38,521 million, net income was SF 7,564 million, average common stockholders' equity was SF 34,236 million, and average total assets were SF 90,569 million. Compute Nestl's gross profit percentage, return on sales, return on average common stockholders' equity, and return on average total assets.