Length  Fractions x Width Fractions Square Inches        
  x  
  Click on boxes and a drop down menu will appear.  
  Select measurements and it will automatically total square inches.  
  Refer to chart and pick out filter price.    
  Type the amount in "Cost of Filter" box and it will automatically give you a total price.  
       
  Cost of Filter   Sub Total Tax Sub Total Delivery Total  
  x  
    7% Sales Tax        
           
       
       
 

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