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 distribution hub?

Distribution Hub
Bidder	1	2	3	4
Martin Products	185	180	130	235
Schmidt Materials	150	240	145	215
Miller Containers	220	225	140	240
D&J Burns	165	185	185	275
Larbes Furnishings	210	180	145	240
Lawler Depot	235	195	140	255

Bidder	Decision	Bid
Martin Products	SelectReject	185180130235not applicable as bidder is not selected
Schmidt Materials	SelectReject	150240145215not applicable as bidder is not selected
Miller Containers	SelectReject	220225140240not applicable as bidder is not selected
D&J Burns	SelectReject	165185185275not applicable as bidder is not selected
Larbes Furnishings	SelectReject	210180145240not applicable as bidder is not selected
Lawler Depot	SelectReject	235195140255not applicable as bidder is not selected

The value of the objective function is fill in the blank 13 thousands of dollars.