For me, and I think players early in their poker learning this isn't such a simple call. Dont get my wrong, I'm calling here but I like to think through he spot and be very aware of why I am calling.

Our button open should be pretty wide we have tons of hands and tons of bluffs and semi-bluffs. Small blind calling looks weak as well. A player in the big blind has no reason to believe you have a strong hand. They should be aware (even at this low level) that you two are unlikely to have a hand you want to play with the way the preflop action has gone.

I expect big blind to raise alot. Now he decides to open shove 50 big blinds? What types of hands is he doing that with? I rule out huge hands like AA, KK, QQ because the way this type of player is thinking at this level is those are hands he wants to play a pot with. He doesn't want to scare you. To me this line indicated big blind has a hand that he perceives as good but not a hand he really wants to see a flop with and not know what to do. AK, AQ, AJ, tons of pocketpairs KQ may play this way. JJ plays so well against that range of hands its a great spot to pick up chips.

When you take the  level ino account ($1 MTT) players aren't going to be thinking that much at all so that above range becomes even wider in a lot of cases and we saw that here. So yes this is a pretty easy call to make but know why its an easy call. I'd also recommend not worry about the results. It really can get in the way of learning. Think about the spot, the range of hands your opponent can have and then weigh all that to make the best descision.