In the Year Ending 31 December, North Lakes Co

In the year ending 31 December, North Lakes Co. Ltd purchased machinery for $20 000, loaned $8000 to another company, borrowed $4000, and sold investments for $10 000. What was the net cash flow from investing activities for the year ending 31 December?

A) ($20 000)
B) ($28 000)
C) ($24 000)
D) ($18 000)