[nemomarx]

Which is a fair discount, but it should be like "15 a month, 120 if you get a year up front" right?

[Jblx2]

  $15/month * 12 months = $180
  $12/month * 12 months = $144
  $120 / 12 months = $10/month

[preg_match]

Right but the 10/month price is actually unreachable, I can't pay 10 dollars every single month. Which is generally what that language means to consumer. When we say "10 dollars per month" that parses as "10 dollars paid each month" NOT "10 dollars per month of service". I understand that's strange, but that's how I would say almost all consumers read it.