A worker picks up boxes from the floor and places them on a conveyor. This activity will occur every 30s. The boxes, weighing 23 lb. each, are located 20 in. forward of the worker’s ankle midpoint at the point of grasping them. The conveyor is 38 in. high. There is no twisting during the lift. Determine the recommended weight limit (RWL) and lifting index (LI) for this activity.