Jackson Company Gathered the Following Data to Prepare Its 20X7

Jackson Company gathered the following data to prepare its 20X7 statement of cash flows: $$\begin{array} { | l | r | } \hline \text { Profit } & \$ 40,000 \\\hline \text { Depreciation expense } & 5,000 \\\hline \text { Trade receivables decrease } & 3,000 \\\hline \text { Wages payable increase } & 4,000 \\\hline \text { Amortization of patent } & 1,000 \\\hline \text { Income tax payable decrease } & 2,000 \\\hline\end{array}$$ Based only on the above data, the net cash inflow from operating activities during 20X7 was which of the following?

A) $43,000.
B) $45,000.
C) $51,000.
D) $53,000.