Convert the Number in the Sentence to Standard Notation $\$ 236.1$

Convert the number in the sentence to standard notation.
-The total value of imports and exports for a certain country is $\$ 236.1$ billion.

A) $\$ 2,361,000,000,000$
B) $\$ 236,100,000,000,000$
C) $\$ 236,100,000,000$
D) $\$ 23,610,000,000$