[Dilettante_Pro]

<input type="checkbox" name="n1" value="1" id="n1" /><input type="text" name="f1" id="f1" value="100"><br />
<input type="checkbox" name="n2" value="2" id="n2" /><input type="text" name="f2" id="f2" value="30"><br />
<input type="checkbox" name="n3" value="3" id="n3" /><input type="text" name="f3" id="f3" value="60"><br />
<input type="checkbox" name="n4" value="4" id="n4" /><input type="text" name="f4" id="f4" value="50"><br />

<input id="result"><input id="result2">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script>
$("input").click(function() {
var sum = 0, sum2 = 0;
$("input:checked").each(function(){
 sum+= +$(this).val();
 sum2 += +$(this).next().val();
});
$('#result').val(sum);
$('#result2').val(sum2);
}); 
</script>