ACT Problem 50

$$\begin{array}{lcl} 50.\:James\:is\:hired\:for\:a\:job\:that\:pays\:\$ 600\:per\\ month\:and\:receives\:15\%\:raise\:in\:each\:following\\ month.\:In\:the\:fourth\:month,\:how\:much\:will\:\\ James\:earn\:?\\ \\ (A):\$ 680\\ (B):\$ 912.5\\ (C):\$ 815\\ (D):\$ 756.5\\ (E):\$ 900\\ \end{array}$$