<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script>
var jQ = $.noConflict(true);

// version 5
jQ( document ).ready(function() {
jQ('input[name="totalamount"]').val((441 * 1.03).toFixed(2));
jQ('input[name="typeofpayment"]').on('click', function() {

var value = jQ(this).val();
if(value =="Logo Design (75.00)"){

var plus3percent = 75 * 1.03;
}else if(value =="Stater Pkg (189.00)"){

var plus3percent = 189 * 1.03;
}else if(value =="Basic Pkg (357.00)"){

var plus3percent = 357 * 1.03;
}else if(value =="Business Pkg (441.00)"){

var plus3percent = 441 * 1.03;
}else if(value =="Total Pro Pkg (504.00)"){

var plus3percent = 504 * 1.03;
}else if(value =="Basic Hosting Pkg (48.00)"){

var plus3percent = 48 * 1.03;
}else if(value =="Premiun Hosting Pkg (72.00)"){

var plus3percent = 72 * 1.03;
}

if(plus3percent > 0){
jQ('input[name="totalamount"]').val((plus3percent).toFixed(2));
}
});
});
</script>