Help on these please!!

12. What is the difference between the current ratio and the quick ratio? Why might a firm wanting to make sure they have enough cash on hand in case of an emergency prefer using the quick ratio? 13. If a company's sales is $500 and inventory is $30, what is the inventory turnover? Would a manager generally want this number to be high or lower? 14. How do you compute profit margin? and what is the difference between profit margin and operating margin