Keystone Resources has a net profit margin of 8 percent and earnings after taxes of $2 million. Its current balance sheet is as follows:
| 
 Current assets 
 | 
 $6,000,000 
 | 
 Current liabilities 
 | 
 $3,500,000 
 | 
| 
 Fixed assets 
 | 
 10,000,000 
 | 
 Long-term debt 
 | 
 5,500,000 
 | 
| 
 Total assets 
 | 
 $16,000,000 
 | 
 Common stock 
 | 
 2,000,000 
 | 
| 
 Total liabilities and   stockholders' equity 
 | 
 $16,000,000 
 | 
 Retained earnings 
 | 
 5,000,000 
 | 
a. Calculate Keystone's return on stockholders' equity.
b. Industry average ratios are
Net  profit margin                          10%
Total asset turnover                      2.0 times
Equity multiplier                            1.5 times
What does a comparison of Keystone to these averages indicate about the firm's strengths and weaknesses?
c. Keystone has inventories of $3.2 million. Compute the firm's quick ratio.