! Keywords: MRP, make or buy, integer program;
MIN     1.04 UM + 2.6 UB + 1.16 RM + 5.2 RB + 1.9 TM + 3.1 TB
     + 0.2 SM + 0.25 SB + 0.22 WM + 1.4 WB + 0.26 CM + 0.96 CB
     + 0.16 HM + 0.19 HB + 0.04 PM + 0.07 PB + 0.03 LM 
     + 0.05 LB
SUBJECT TO
UNICYCLE)   UM + UB =     100 
 REGULAR)   RM + RB =     500
TWINBIKE)   TM + TB =     200
   SEATS) - UM - RM - 2 TM + SM + SB =    0
  WHEELS) - UM - 2 RM - 2 TM + WM + WB =     0
  CHAINS) - RM - 2 TM + CM + CB =    0
    HUBS) - WM + HM + HB =    0
  SPOKES) - 36 WM + PM + PB =    0
   LINKS) - 84 CM + LM + LB =    0
END


