Firebase Query using emberjs

I'm trying to sort a list of products from highest to lowest. The file json has been uploaded to firebase. TypeError: Cannot read property 'query' of undefined thats the error i'm receiving. My model is called "product" and it has the price attribute Here is the code:

sortHigh: ['product.price'],
actions:{
  sortHigh(product) {
    sortedProducts: Ember.computed.sort('product', 'sortHigh')
    return this.store.query('product').sortHigh('price');
  }
}

HTML Highest Price