Answer
$\$420; \$560;\$665;\$770$
Work Step by Step
We are given the function:
$W(h)=\begin{cases}
14h,0\lt h\leq 40\\
21(h-40)+560,h\gt 40
\end{cases}$
Compute $W(30),W(40),W(45),W(50)$:
$W(30)=14(30)=420$
$W(40)=14(40)=560$
$W(45)=21(45-40)+560=105+560=665$
$W(50)=21(50-40)+560=210+560=770$