The following table shows the number of vacancies of sub-inspector in different states. Study the table carefully and answer the following question.
$$
\begin{array}{|c|c|c|c|c|c|}
\hline \text { Year } & \text { Haryana } & \text { Uttarakhand } & \text { Uttar Pradesh } & \text { Bihar } & \text { Himachal } \\
\hline 2018 & 3500 & 1200 & 6000 & 2500 & 1500 \\
\hline 2019 & 3000 & 1500 & 4500 & 3000 & 2200 \\
\hline 2020 & 3200 & 1800 & 5000 & 3200 & 3000 \\
\hline 2021 & 2300 & 1500 & 4200 & 2300 & 1600 \\
\hline
\end{array}
$$
If in West Bengal the total vacancies in all the year is $20 \%$ more than the total vacancies in Bihar in all the years. Find the total number of vacancies in West Bengal in all the years.
(a) 12000
(b) 13000
(c) 15000
(d) 13200