Try out Jquery expressions

value1 = 10
value2 = 20
value3 = 30
$('#value1') = 10 = must be 10
$('.values') = 10,20,30 = must be 10,20,30
+: $('.values') = 60 = must be 10 + 20 + 30
+: 100 $('.values') = 160 = must be 100 + 10 + 20 + 30