Horsey people: How much you spend on average per month for your horse?

Well, I have one horse. I do chores in a barn of 7 in exchange for board. So that is 0 dollars... Farrier every 6 weeks, 25 dollars and a wormer every six weeks 20 dollars. And shots for the year are 160 dollars... So I don't spend very much. Approx 58 dollars per month or so... But if you were to work out how much work I do and what my board is, technically at the end of the month my barn owes me between 150-300 dollars extra per month that I do not receive... :)