The Polynomial $0.0034 x ^ { 4 } + 0.0047 x ^ { 3 } + 0.0053 x ^ { 2 } + 0.17 x + 1.73$

The polynomial $0.0034 x ^ { 4 } + 0.0047 x ^ { 3 } + 0.0053 x ^ { 2 } + 0.17 x + 1.73$ gives the predicted sales volume of a company, in millions of items, where x is the number of years from now. Determine the predicted sales 18 years from now.
Round your answer to the nearest hundredth million.

A) $390.84 million
B) $358.01 million
C) $538.53 million
D) $386.41 million