A 30% range is more like 22+, A2s+, K7s+, Q8s+, J9s+, T8s+, 98s, 87s, A2o+, KTo+, QTo+, JTo. There is no K5s or Q9o
The pot is 150*9 (ante) + 600 + 1,200 (blinds) + 11,827. You have to call 11,827-1,200
10,627/(10,627+14,977) = 41,5%
If he shoves only 44+,A8s+,KQs,A9o+ (10%) you sill have to call.
MP2 56.98% 52.16% 4.81% { 44+, A8s+, KQs, A9o+ }
MP3 43.02% 38.21% 4.81% { AsTs }
I would personally shove 40% here (omg omg, this is loose!!)
Let's say i shove K5s, your calling range is 77+, AJ+ (7.27% | 89 combos) Let's say BU and SB call the same range and fk off the CU.
This mean 92.73% of the time, BU folds. 7.27% of the time I have 32.24% equity.
Same for SB and BB.
So overall, everybody is going to fold 79,73% of the time. I'll be call 20.27%, but when I'm call, I still have 32.24% equity!
Therefore I make a good profit by shoving K5s here. You can do the math if you want.
Look, if these range are correct :
CO calls a push with 17.9%, 22+ A6s+ ATo+ K8s+ KJo+ Q9s+ J9s+ T8s+ 98s 87s
BU overshoves 5.6%, 88+ AQs+ AQo+
SB overshoves 5.6%, 88+ AQs+ AQo+
BB overshoves 5.6%, 88+ AQs+ AQo+
BU calls a push with 8.0%, 66+ AJs+ AJo+ KQs
SB overshoves 3.5%, TT+ AKs AKo
BB overshoves 3.5%, TT+ AKs AKo
SB 7.7%, 66+ AJs+ AJo+
BB overshoves 3.5%, TT+ AKs AKo
BB 8.0%, 66+ ATs+ AJo+
In green cards that MP can make a +cEV shove with. ~white = ~cEV0. red = -cEV

So if you knew that your opponents will call that tight, if you were MP, you should have shove ATC, even 32o.
So absolutely no, you CAN'T fold ATs here. And I am 100% affirmative, you CAN'T.
Well, you can, but in that case, you're not a winning MTTs player.