In the packing department, a worker stands sideways between the end of a conveyor and pallet. The surface of the conveyor is $75$ cm from the floor and the top of the pallet is $20$ cm from the floor. As a box moves to the end of the conveyor the worker twists $45$ to pick up the box, then twists $180$ in the opposite direction and sets the box down on the pallet. Each box is $24$ cm on aside and weighs $15$ kg$.$ Assume he moves $3$ boxes per minute for an $8-$hour shift. Using the NIOSH lifting equation, calculate RWL and LI$.$ Redesign the task to improve it$.$ What is now the RWL and LI$?$