Fix this Plant Location Model: CAPLOC Lingo code of optimization of capacity plant location to make the Min Total cost = $27751

Please tell me what I should change in order to get this result, should I close a certain plant or change the fixed cost? or add more constraints?

(the case study we're solving is the The case of HighOptic, TelecomOne and TelecomOptic) :

MODEL: SETS: SC : Fcost, CAP, OPEN; DC: DEM; LINKS(SC,DC): CST, QTY; ENDSETS DATA: SC = Balt Chey SaltL Memph Wich; DC= Atl Bost Chic Den Oma Port; FCOST= 7650 3500 5000 4100 2200; CAP = 18, 24, 27, 22, 31; DEM = 10, 8, 14, 6, 7, 11; CST = 1675, 400, 685, 1630, 1160, 2800, 1460, 1940, 970, 100, 495, 1200, 1925, 2400, 1425, 500, 950, 800, 380, 1355, 543, 1045, 665, 2321, 922, 1646, 700, 508, 311, 1797; NPOPEN= 3; ENDDATA !objective func; [TTL_CST] MIN = FCTOT+SCTOT; SCTOT= @SUM(LINKS(I,J): CST(I,J)*QTY(I,J)); FCTOT= @SUM(SC(I) :FCOST(I)*OPEN(I)); !CONSTRAINTS; @FOR(SC(I): @SUM(DC(J): QTY(I,J)) <= CAP(I)); @FOR(DC(J): [DEMAND] @SUM(SC(I) :QTY(I,J)) >= DEM(J)); @FOR( SC(I) : [SUPPLY] @SUM (DC(J) :QTY(I, J)) <= CAP(I)*OPEN(I); !open is binary(0/1); @BIN (OPEN(I)); ); @SUM(SC(I): OPEN(I)) <= NPOPEN; END