Final answer:
Increasing total employee compensation by 4% and realizing a 6% increase in production worker productivity is guaranteed to result in lower labor costs per pair.
Step-by-step explanation:
Increasing total employee compensation by 4% and realizing a 6% increase in production worker productivity is guaranteed to result in lower labor costs per pair. This is because by increasing employee compensation, companies can motivate their workers to increase their productivity. As a result, fewer workers would be needed to produce the same amount of pairs, reducing the overall labor costs per pair.