Plum IncAcquired 90% of the Capital Stock of Sterling Co

Multiple Choice

Plum Inc.acquired 90% of the capital stock of Sterling Co.on 1/1/16 at a cost of $540,000.On this date Sterling had equipment (10-year life) carried at $200,000 under market and total equity amounting to $350,000. ​
On 1/1/16 Sterling acquired 5% (10,000 shares) of Plum's outstanding common stock for $3 per share.Internally generated net income was $50,000 for Plum and $40,000 for Sterling.The non-controlling interest in consolidated net income is

A) ​$2,000
B) ​$18,000
C) ​$7,500
D) ​$6,800