Determine the Amount of Cash Received from Customers During 2014

Determine the amount of cash received from customers during 2014. $$\begin{array} { l r } \text { Accounts Receiv able (31-Dec-2013) } & \$ 21,000 \\\text { Accounts Receiv able (31-Dec-2014) } & 18,000 \\\text { Sales } & 90,000\end{array}$$

A) $57 000
B) $63 000
C) $87 000
D) $93 000