Below is the top view $($not to scale$)$ of a site on which grid leveling has been conducted. Ground elevations $($in m $)$ are presented at every node. The grid cells are $10$ mx $10$ m $.$

The site is to be finished to an elevation of $147$ m $.$ Calculate gross earthwork volume for the site. $C{F}_{\text{c}\text{u}\text{t}}=1\mathrm{.}15$ and $C{F}_{\text{f}\text{i}\text{l}\text{l}}=1\mathrm{.}15$