Credit: Unsplash/CC0 Public Domain United Parcel Service Inc. will invest $120 million in 400 robots used to unload trucks, according to people familiar with the matter, revealing new details on the logistics giant's $9 billion automation plan that aims to boost profits by decreasing labor costs. Unloading trucks and shipping containers at warehouse docks is mostly done by people and remains a key bottleneck in the shipping industry. The UPS order puts a s