How can I sum the checkbox and radio

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PHP

hello I want to calculate the checkbox and radio ass the total of additional fee I already
calculate the total price now i just want the total of the the additional option only .
i want the sum of keitai and komono with hout the flower price.

What I have tried:

	<title>Flower shop Takanawa


	<div style="text-align: center">
		<br>
		<h2>Welcome!<br>
			Flower shop # Takanawa # Welcome<br></h2>
			It's a small shop, but I look forward to your continued support.<br>
			<br>
		</div>
		
		<hr>
		(Name)<br>
		(Type)
		  Rose(2,800yen)  
		  Tulips(2,500yen) 
	      Gerbera(1,800yen) 
	      Carnation(1,200yen)  
	      Casablanca(5,800yen)
	  <br>
	  (Form)Bouquet(no additional charge)
	       Potted plant(additional charge 800yen)
	       Preserved flower(additional charge 3000 yen)<br>
	       (accessories)Message card (additional 150 yen)   
	       Flower language dictionary (additional 500yen)
	       Gardening set (additional 1,500yen)
	       <br>
	       <hr>
	        
		
		<br>
	


	
	

the code 


	   
 


\n";
   print "<br>\n";

    $structName= array("Bouquet","potted plant", "preserved flower");

    $structPrice = array(0,800,3000);

    $keitai = $_POST["keitai"];
    $sum= $flowerPrice[$hana]+ $structPrice[$keitai];
    print "(Form)$structName[$keitai]:$structPrice[$keitai] yen<br>\n";
  
    $accessoryName = array("Message card","Flower language dictionary","Gardening set");
    $accessoryPrice = array(150,500,1500);
  
     
for($i =0; $i <3; $i++){
    	if($_POST["komono".(string)$i]=="on"){
    		print"(accessory)$accessoryName[$i]:$accessoryPrice[$i] yen<br>\n";
    		$sum= $sum + $accessoryPrice[$i];
               
    	}
            
    }
     
    print "<br>\n";
    print "<hr><span style="color: blue">(total price)$sum yen <br>\n";
    
?>

</span>