In a reverse auction, when at least two of the selected bids include different units, or quantities, of the same item, {HEAD ~ all units} of {TAIL ~ all items} are included in each candidate allocation 
of
In a reverse auction , when at least two of the selected bids include different units , or quantities , of the same item , { HEAD ~ all units } of { TAIL ~ all items } are included in each candidate allocation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH