Matrix multiplication

In a competition, the number of participants in three events is represented by matrix $N = \begin{bmatrix} 18 & 24 & 30 \end{bmatrix}$. The registration fees (in dollars) for the three events are represented by matrix $F = \begin{bmatrix} 12 \ 15 \ 20 \end{bmatrix}$. Using matrix multiplication, find the total registration fees collected.