Looking at a company's balance sheet you see on the asset side that the company reports $717 million in cash and marketable securities, $224 million in accounts receivables, $922 million in inventories, and $71 million in other current assets. Looking at the liabilities side you see that the company has $605 million in short term debt, $521 million in accounts payable, and $63 million in other short-term liabilities. What is the company's cash ratio?