Walmark Store compresses and palletizes empty merchandise cartons for recycling. The store generates 5 pallets per day. The cost of storing a pallet in the store's back lot is $.10 per day. The company that moves the pallets to the recycling center charges a flat fee of $100 dollars for the rental of its loading equipment plus a variable transportation cost of $3 per pallet. Graph the change in number of pallets over time, and devise an optimal policy for hauling the pallets to the recycling center.