Bad Qubits — Learn Quantum by Doing

Multiple choice

A fault-tolerant circuit contains 12 Toffoli gates plus 4 standalone T-gates. Each Toffoli decomposes into 7 T-gates. What is the total T-count of the circuit?

23 (12+7+4)
112 (adding the standalone gates before multiplying: (12+4)*7)
84 (forgetting the 4 standalone T-gates)
88