class Faker::Company

def czech_organisation_number 

def czech_organisation_number
  sum = 0
  base = []
  [8, 7, 6, 5, 4, 3, 2].each do |weight|
    base << sample((0..9).to_a)
    sum += (weight * base.last)
  end
  base << (11 - (sum % 11)) % 10
  base.join
end