Answer:
What do you mean what yousnap
Explanation:
 
        
             
        
        
        
Grand Total + Total Bill Subtotal Sales Tax (7.9%) 
Total Tip (20%) 
Each Pays + Sales tax of 7.9% towards $80.00 is $6.32
 A tip of 20% towards $86.32 is $17.26
does this help?
 
        
             
        
        
        
heterogeneity defined as the variability of inputs and outputs of services, which makes services less standardized and uniform than goods.