I wanted to add a few things I forgot and I hate the "edited last" thing as it implies you typed something you shouldn't have in the first place and now regret it, so I will add my thoughts here.
I forgot the typical 3% commission on the salebarn sale, so you have to subtract the $26 for that. Also remember the transportation to the barn.
You also have to add transportation to the expo. You mentioned you were from MN, so that will add up with fuel prices as high as they are. Figure $200 for fuel/truck cost.
I reviewed the last several years of the maine sale at the Iowa Expo. Averaged something around $2000. So since you are a "unknown" you probably won't come close to $2500, maybe around $2000 or $1850.
herf-ball had a good point, if you are trying to establish yourself as a breeder, then remember to factor in the advertising value of attending the expo, but remember, if you take something that "isn't up to snuff" it will hurt your reputation more than it will help.
I am not saying your calf is not "bull worthy", nor am I saying it isn't "steer worthy", I am just saying do the math, be realistic (which is something many have a hard time doing - including myself) and make the call yourself.