The best answer to go with is b
        
             
        
        
        
Answer:
$0.13  per oz
Step-by-step explanation:
since you have $2.86, you have to split it into 22 ounces. You divide the 2.86 and the 22oz. and get 0.13
 
        
             
        
        
        
The answer is 91 ............
        
                    
             
        
        
        
Answer:
Then, it costs $2120 to order 1000 pens and 2000 notebooks. 
Step-by-step explanation:
The Students' Union needs to order 1000 pens and 2000 notebooks. The price per pen when buying 1000 of them is 60c. The price per notebook when buying 2000 of them is 76c. 
Then the total of money needed to order 1000 pens and 2000 notebooks is:
Total Money = 1000 × 0.60 + 2000 × 0.76 = $2120
Then, it costs $2120 to order 1000 pens and 2000 notebooks.