A Transfers Machines Valued at $170,000 (Basis = $150,000)along with $30,000

A transfers machines valued at $170,000 (basis = $150,000) along with $30,000 cash to AB Corporation and B transfers real property valued at $320,000 (basis = $310,000) to the corporation.A receives 40 percent of the outstanding stock and B receives 60 percent.B also receives $20,000 from the corporation.What is A's basis for his AB stock?

A) $180,000
B) $170,000
C) $160,000
D) $150,000
E) None of the above