I now own a 2 BD LO and a 1 BD LG, but both EOY.
Mystarcentral says it is $417.12 for my 2 BD LO EOY. Not sure if there is that $20-40 fee for owning an EOY or not added in there.
The large 1 bedroom EOY is listed as $293.02 per year, which times 2 is more than what you have listed for the EY, $586.04, so exactly $40 more total, or $20 extra per year, per interval. So I guess there are fees for EOYs.
That means that a small 1 bedroom EOY would be your number, $463.31 + $40.00, divided by 2, or $503.31/2 or $251.66 per year.