That's exactly what i said. Haha.
If 14 is the starting point by them and it takes 13 to get sig suit with gloves, that's 27. But they also say "if you have missed/failed too many (FROM 14), you won't be able to unlock ALL the rewards."
So now it's up to us to GUESS how many they consider is "missed/failed". To me it's about 5. Could be more, could be less. So could be 3 or could be 7.
So doing the math again, 14+13=27 et. And that's 27 WITHOUT missing/failing any ET's from when they state to not miss/fail any. So now adding what they consider is too many of missed/failed, that could be 27+5. I used the low number of 3 which would make 30 ET's. But it could also be 33 or 35. But I do believe based on my math, it's no less than 30.
Of course, all speculation.