Use the Data in Table: Wendy's Windows to Answer the Question

Use the data in Table: Wendy's Windows to answer the question.
What is the marginal revenue product of the fourth worker?
$\begin{array}{l}\text { Table: Wendy's Windows (price }=\$ 200 \text { ) }\\\begin{array}{|l|l|}\hline \begin{array}{c}\text { Number of } \\\text { workers (weekly } \\\text { wage } \$ 600) \end{array} & \begin{array}{c}\text { Marginal product } \\\text { (weekly) }\end{array} \\\hline 1 & 5 \\\hline 2 & 4 \\\hline 3 & 3 \\\hline 4 & 2 \\\hline\end{array}\end{array}$

A) $400
B) $600
C) $1,200
D) $2,400