]>Minimizing Costs Can Be Costly : Table 4
Table 4: Algebraic LP formulation with data for maximizing profit (in Figure 6).
Max 𝑅 = 40[ 0 . 9 5 𝑋 5 , 7 + 0 . 9 0 𝑋 6 , 7 ] + 25[ 0 . 9 0 𝑋 5 , 8 + 0 . 9 5 𝑋 6 , 8 ] + 30[ 0 . 9 0 𝑋 5 , 9 + 0 . 9 5 𝑋 6 , 9 ]
(9.1)  − [ 1 3 𝑋 1 , 5 + 1 2 𝑋 1 , 6 + 1 1 𝑋 2 , 5 + 1 3 𝑋 2 , 6 + 9 𝑋 3 , 5 + 1 0 𝑋 3 , 6 + 1 3 𝑋 4 , 5 + 1 4 𝑋 4 , 6 + 5 𝑋 5 , 7 + 6 𝑋 6 , 7 + 6 𝑋 5 , 8
    + 8 𝑋 6 , 8 + 8 𝑋 5 , 9 + 7 𝑋 6 , 9 ]
(5.2) 𝑋 1 , 5 + 𝑋 1 , 6 ≤ 7 0 node 1 (Newspaper)Set S
𝑋 2 , 5 + 𝑋 2 , 6 ≤ 5 0 node 2 (Mixed paper)
𝑋 3 , 5 + 𝑋 3 , 6 ≤ 3 0 node 3 (White office paper)
𝑋 4 , 5 + 𝑋 4 , 6 ≤ 4 0 node 4 (Cardboard)
(5.3) 0 . 9 0 𝑋 1 , 5 + 0 . 8 0 𝑋 2 , 5 + 0 . 9 5 𝑋 3 , 5 + 0 . 7 5 𝑋 4 , 5 ≥ 𝑋 5 , 7 + 𝑋 5 , 8 + 𝑋 5 , 9 node 5 (Recycling process A)Set T
0 . 8 5 𝑋 1 , 6 + 0 . 8 5 𝑋 2 , 6 + 0 . 9 0 𝑋 3 , 6 + 0 . 8 5 𝑋 4 , 6 ≥ 𝑋 6 , 7 + 𝑋 6 , 8 + 𝑋 6 , 9 node 6 (Recycling process B)
(9.2) 0 . 9 5 𝑋 5 , 7 + 0 . 9 0 𝑋 6 , 7 ≤ 6 0 node 7 (Pulp for newsprint)Set D
0 . 9 0 𝑋 5 , 8 + 0 . 9 5 𝑋 6 , 8 ≤ 4 0 node 8 (Pulp for packaging paper)
0 . 9 0 𝑋 5 , 9 + 0 . 9 5 𝑋 6 , 9 ≤ 5 0 node 9 (Pulp for print stock quality paper)