var cost = (function(){

var args = [];

return function(){

console.log(arguments);

if(arguments.length === 0){

console.log(11111);

var money = 0;

for(var i = 0, l = args.length; i < l; i++){

console.log(args);

money += args[i];

}

return money;

}else{

console.log(22222);

[].push.apply(args, arguments);

console.log(args);

}

}

}());