Finding tension in a net supporting a suspended object

[MicahP]

Homework Statement

Homework Equations

$Ʃτ = 0$
$τ = rFsinθ$

The Attempt at a Solution

I'm not even really sure where to start with this. My first thought was that it's not moving, so presumably the forces sum to 0. I also thought of treating the point where the net is exerting force as a point of rotation, but that doesn't make much sense.

 

[haruspex]

There's an unknown force you don't care about: the force of the ground on the pole. So you want to take moments about a point for which that force will have no moment. What point is that?