How to i18n dropdown menu values. populated from database table.

[Pavel Krejsa]

I have cargo form with dropdown menu in simple_forms, which is populated from model cargo_price:

<%= f.association :cargo_price, :label_method => :price, :value_method => :id %>

There is model called cargo_price with only ID and price columns, price column has 3 values (these values are populated to dropdown menu via that association) . I would like to i18n this populated menu. Is there any best practice for such a case? I tried without success to put translation to yaml file:

en:
  simple_forms:
    options:
      price:
        allin: 'All in'
        pp: '40 PlusPLus'
        makeoffer: 'Offer'

thanx a lot