I am trying to build a simple table that if the user enters any miles.  It multiplies that value by 0.535 and puts it into the Total field.

Otherwise the user can just input a value into the Total field if they don't need to input any miles.

Likewise I need to sum all the Total values into a Grand Total field outside of the Table.

Here is the table and Javascript I am trying to work with and the classes so you can see which fields I am trying to call in the Javascript.

$(document).ready(function () {
$('.cf-table-block').on('blur', 'input', sumtotal);

    
      function sumtotal() {
        var sum = 0;
        $('.cf-table-block tbody tr').each(function () {
            //Run if Miles field NOT Empty
          	if(($(this).find('.miles input').val() != ""){
                var s = 0;
                var miles = 0;
                var fueltotal = 0;
            	miles = parseNumber($(this).find('.miles input').val())
    			fueltotal = (miles * 0.535).toFixed(2);
    			s = $(this).find('.total input').val((fueltotal).toFixed(2));
                sum += s;
        	}
            //Run if Miles Empty                               
            else{
				var s = 0;
                s = $(this).find('.total input').val();                           
                sum += s;                           
            }                                 
       });

       $('.grandtotal input').val((sum).toFixed(2));
    }
  
  
function parseNumber(n) {
	var f = parseFloat(n); //Convert to float number.
	return isNaN(f) ? alert('Not Float') : f; //treat invalid input as 0;
}
  
  
});