Matrix multiplication

In a concert, the numbers of performers in Choir, Band and Dance are represented by
$C = \begin{bmatrix} 18 \\24 \\30 \end{bmatrix}$.

Their monthly training fees (in dollars) are represented by
$F = \begin{bmatrix} 40 & 35 & 50 \end{bmatrix}$.

Using matrix multiplication, find the total training fees collected in a month.