Answer:
The answer is D. $180,000
Step-by-step explanation:
Investing activities is about spending on long term asset or long term investments.
Under investing activities in cash flow, what constitutes inflow is the sales of these long term assets like plant and machinery and what constitutes outflow is the purchase of these assets.
In this question, the inflow is the sale of equipment which us $270,000 and outflow is the purchase of equipment for $90,000.
So net cash flow from investing activities is:
$270,000 - $90,000
=$180,000