• Calculate and interpret key financial ratios for UnitedHealth Group including liquidity (current ratio, collection period, days cash-on-hand, average payment period), profitability (operating margin (%), total margin (%), return on net assets (%), asset efficiency (total asset efficiency, age of plant (years), fixed asset turnover, current asset turnover, inventory turnover) and capital structure (net asset financing [%], long-term debt to capitalization, debt service coverage, cash flow to debt [%])