class Numeric

Number helpers

def to_commas

def to_commas
  num = to_s.reverse.scan(/(?:\d*\.)?\d{1,3}-?/).join(',').reverse
  dec = num.split('.')
  num = dec[0].to_s + '.' + dec[1].to_s.ljust(2, '0')[0,2] if dec[1]
  num
end