the following values are to calculate the user entered values, these are calculated and passed to the text field, 

```
if(computer && monitor && tv && laptop && cell)
      { // getting the text field the values and calculated 
         var valueCom = document.getElementById("computer").value ;
         var valueMon = document.getElementById("monitor").value ; 
         var valueTv  = document.getElementById("tv").value ; 
         var valueLap = document.getElementById("laptop").value ;
         var valueCel = document.getElementById("cell").value;

         var finalCom = valueCom * 0.1818937134 ;        
         var finalMon = valueMon * 0.056842 ;    
         var finalTv  = valueTv  * 0.056842 ;           
         var finalLap = valueLap * 0.090947 ;        
         var finalCel = valueCel * 0.045473 ;     

         var totalTonnes = finalCom + finalMon + finalTv + finalLap + finalCel; 

         var totalCarbon  = totalTonnes * 1 ; 
         var totalTree    = totalTonnes * 17.1969 ;
         var totalPetrol  = totalTonnes * 286.396 ;
         var totalPlastic = totalTonnes * 646.421 ; 
// pass this above four values to the textfield

      }
<input type="text" name="carbon" >
<input type="text" name="tree" >
<input type="text" name="petrol" >
<input type="text" name="plastic" >
// field to pass values here

```

how to pass this values using java script to the text field. can anyone help me please