write some unit tests for this. the best way to do that would be to move the function into `Balanced.Utils.formatCurrency` and then change this code to `Ember.Handlebars.registerBoundHelper('centsToDollars', Balanced.Utils.formatCurrency);`. this has the added bonus of allowing us to use it outside of templates.

your test should test values like -1, -105, 0, 1, 105, 100000, 100000000 to make sure we cover all cases.