Q:

Accessing an Ember. Mixin within a custom handlebars helper

Is there an elegant way of using methods defined in an Ember. Mixin object within a custom handlebars helper? 
For example, in my case I have a mixin, App. Format which contains a bunch of different methods for formatting numbers, dates, ect and I would like to make some of these methods accessible directly from templates via custom helpers (e.g. {{formatNumber 450324}}).  The reason I don't just put the method implementation directly in the helper instead of the mixin is that I also need these methods to be available in controllers, views, ect.  And in the interest of keeping my code DRY, I definitely do not want to have duplicate code in the mixin and the helpers. 
Is there any canonical, "emberish" way to accomplish this, or am I just thinking about it in the completely wrong way altogether? 
Edit: Here is a jsbin to better illustrate the problem:
http://emberjs.jsbin.com/wunug/1/edit?html,js,output (look at lines 33-37)

A:

The method Mixin.apply makes the job. 
Ember. Handlebars.helper('formatNumber', function(num, decimals) {
  var format = App.Format.apply({});
  return format.formatNumber(num, decimals || 2);
});

