Answer
$87 \ joules $
Work Step by Step
Let us consider that $D$ be the displacement vector.
Then we have:
$D=\lt 5-1, 3-0,8-2 \gt=\lt 4, 3, 6 \gt $
Now, work $W=F \cdot D$
Thus:
$W= \lt 3, 5, 10 \gt \cdot \lt 4, 3, 6 \gt \\=(3)(4) +(5)(3) +(10)(6) \\ = 87 \ joules $