Decision variables

Solution variables

Unit cost

or profit

Total contribution

Reduction cost

Machineries (x1)

1

50

50

0

Refuse facility (x2)

0

30

0

30

Borehole water (x3)

1

50

50

0

Shield (x4)

1

10

10

0

Bus stop (x5)

0

20

0

20

Pmax.

160

110