O'Donnell & Joyce purchases components from three suppliers. Components purchased from Supplier A are priced at €7 each and used at the rate of 18,000 units per month. Components purchased from Supplier B are priced at €5 each and are used at the rate of 4,500 units per month. Components purchased from Supplier C are priced at €9 each and used at the rate of 1000 units per month. Currently, O'Donnell & Joyce purchases a separate truckload from each supplier. As part of its JIT drive, O'Donnell & Joyce has decided to aggregate purchases from the three suppliers. The trucking company charges a fixed cost of €550 for the truck with an additional charge of €120 for each stop. Thus, if O'Donnell & Joyce asks for a pickup from only one supplier, it charges €670; from two suppliers, it charges €790; and from three suppliers, it charges €910. What replenishment strategy would you suggest for O'Donnell & Joyce to minimize annual costs?