United Express Service (UES) uses large quantities of packaging materials at its four distribution hubs. After screening potential suppliers, UES identified six vendors that can provide packaging materials that will satisfy its quality standards. UES asked each of the six vendors to submit bids to satisfy annual demand at each of its four distribution hubs over the next year. The following table lists the bids received (in thousands of dollars). UES wants to ensure that each of the distribution hubs is serviced by a different vendor. Which bids should UES accept, and which vendors should UES select to supply each distributionhub?

Distribution Hub Bidder Martin Products Schmidt Materials Miller Containers D&J Burns Larbes Furnishings Lawler Depot 190 150 210 170 220 270 175 235 225 185 190 200 125 155 135 190 140 130 230 220 260 280 240 260