Answer
$28,909$
Work Step by Step
The expanded form of $70355_{\text{eight}}$ is:
$=(7 \times 8^4) + (0 \times 8^3) + (3\times 8^2)+(5 \times 8^1) + (5 \times 1)
\\=(7\times 4096) + 0 + (3 \times 64)+(5\times 8)+5
\\=28,672+192+40+5
\\=28,909$