Answer:
30 or 52
I'm not sure. Sorry. I tried my best. Don't let the "Helping Hand" fool you. You see you said 6 forks and twice as many spoons which equals 12+6. Then "as" knives. I got confused there. I think there it's either 12 or twice as many knives as spoons. In other words, 12×2.
6 + (6 × 2) + (6 × 2) = 30
6 + (6 ×2) + (12 × 2) = 52