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        Signature
      
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        By John Dunn, Attorney-in-Fact
      
      
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        Stock symbol
      
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        CALC
      
      
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        Transactions as of
      
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        Jun 8, 2023
      
      
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        Transactions value $
      
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        $5,225
      
      
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        Form type
      
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        4/A - Amendment
      
      
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        Date filed
      
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        6/15/2023, 07:51 PM
      
      
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        Date Of Original Report
      
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        Jun 9, 2023
      
 
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | CALC | Common Stock | Purchase | $5.23K | +1K | +12.5% | $5.23 | 9K | Jun 8, 2023 | Direct | F1 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses:
  
  
  
    Remarks:
  
  On June 9, 2023, the reporting person filed a Form 4 which incorrectly stated a total of 928 shares were purchased on June 8, 2023. A total of 1,000 shares were purchased by the reporting person on June 8, 2023 as stated in this amendment.