A point charge $2\times {10}^{–2} \mathrm{C}$ is moved from $P$ to $S$ in a uniform electric field of $30 \mathrm{N} {\mathrm{C}}^{–1}$ directed along positive $x$-axis. If coordinates of $P$ and $S$ are $(1, 2, 0) \mathrm{m} \text{and} (0, 0, 0) \mathrm{m}$ respectively, the work done by electric field will be