If it's around $2 a day that would be around $60 a month, right?
That is correct for the Feed For Success supplement combination of RED CAL, Weight Check Oil and the Just Add Oats product. Maybe just a little more based on what size packs you may purchase (also not including the actual feed). Also note that at first they may feed free-choice on more RED CAL at first until they get what they need to get themselves "in balance". They will only eat what they need- they know!
Thanks for asking Jackie!
Reference: WhatToFeedYourHorse.com