Prof. Huffenberger's Astrophysics lab students have to tote a lot of equipment around the plaza surrounding the Keen building. They set up instruments, make some observations, then have to crate everything back up to be taken inside. One of his students loads down a plastic bin (roughly a cube with side length 0.5m) with 100 kg of antennae and readout equipment, and then tries to slide the box back toward the Keen building by applying a force of 98 newtons. The box does not move.

What is the net force acting on the bin (in Newtons)?