[Here](http://plnkr.co/edit/MwZB3OLJj04qBawSFYyF) is the plunkr i have created.
Basically i am facing 2 issues with this piece of code - 

1. I need help loading months in the drop down and
2. When month is changed in the dropdown from `headerController`, the sales for that month is displayed in `detailController`. I am trying to create a dependency between multiple controllers using a `service`.

I will appreciate any help fixing these 2 issues.