Special Interest Group Z Receives a 1\200^th Slice of the Economic

Special interest group Z receives a 1\200^th slice of the economic pie.  Its net benefit from both an economic growth policy and a transfer policy is $30,000.  How much does the size of the economic pie (Real GDP) need to grow before group Z is indifferent between the two policies?

A) $150
B) $600,000
C) $600,000,000
D) $6,000,000