currency.rb

require 'money'

jpy = [ # http://www.amiami.com/top/cart/wishlist?wish_scode=FIGURE-001918
  { :name => 'Makise Kurisu', :price => 6280, :buy => false }, # Steins;Gate
  { :name => 'Shiki Ryougi',  :price => 4480, :buy => false }, # Kara no Kyoukai
  { :name => 'BakeCoin',      :price => 750,  :buy => true  }, # Monogatari
  { :name => 'BakeMousePad',  :price => 470,  :buy => true  }, # Monogatari
  { :name => 'BakeCoin',      :price => 750,  :buy => true  }, # Monogatari
  { :name => 'Rin Shibuya',   :price => 7020, :buy => false }, # iDOLM@STER
  { :name => 'Riko Sunomie',  :price => 5500, :buy => false }, # KissXSis
  { :name => 'Nadeko',        :price => 3580, :buy => true  }, # Monogatari
  { :name => 'Senjougahara',  :price => 7730, :buy => false }, # Monogatari
  { :name => 'Kuroneko',      :price => 6780, :buy => false }, # OreImo
  { :name => 'Sena',          :price => 5040, :buy => true  }, # Haganai
  { :name => 'Saber',         :price => 6200, :buy => false }, # Fate
  { :name => 'Madokami',      :price => 8000, :buy => true  }, # Madoka Magica
].delete_if { |h| !h[:buy] }

Money.add_rate 'JPY', 'EUR', 0.00751072327

jpy.sort_by { |h| h[:price] }.each { |h|
  h[:eur] = Money.new(h[:price], 'JPY').exchange_to('EUR')

  puts "%-13s €%-7s ¥%d" % [ h[:name],
                             h[:eur],
                             h[:price]
                           ]
}

puts "\n%-13s €%-7s ¥%d" % [ 'Total',
                             jpy.map { |h| h[:eur]   }.reduce(:+),
                             jpy.map { |h| h[:price] }.reduce(:+)
                           ]