Final answer:
Place the new patties on the right side of the grill if it's moving from right to left to ensure even cooking and an optimized workflow.
Step-by-step explanation:
If the grill is moving from right to left, and there are already four patties cooking on it, then when four more patties are called back, they should ideally be placed on the right side of the grill. This is so because the patties that are already on the grill have started cooking, so it makes sense to put new, uncooked patties on the right side which is the starting point in the movement from right to left. By doing this, you ensure that all patties are cooked evenly and the workflow is optimized.
This is because the heat source is usually on the right side of the grill. Placing the fresh patties on the left side would allow them to receive the same amount of heat as the already cooking patties.