working capital
current assets - current liabilities
gross profit
sales revenue - cost of sales
operating profit
gross profit - overheads
net profit
operating profit - interest/tax
gross profit margin
( gross profit/revenue ) x100
operating profit margin
( operating profit/revenue ) x100
net profit margin
( net profit/revenue ) x100
current ratio
current assets/current liabilities
acid test ratio
( current assets - inventories ) / current liabilities