Acacia Company Had Inventory of $300,000 on December 31, 20X1

Acacia Company had inventory of $300,000 on December 31, 20X1. Other information is as follows: $$\begin{array} { | l | r | } \hline \text { Purchases } & \$ 1,500,000 \\\hline \text { Sales } & 1,800,000 \\\hline \text { Inventory 1/1/20X1 } & 500,000 \\\hline\end{array}$$ What is the amount of Acacia's cost of goods sold for 20X1?

A) $2,000,000
B) $1,600,000
C) $1,700,000
D) $1,800,000
E) None of these