Table 2 Facility running cost (in dollars)
|  | Time span (k = 1) | Time span (k = 2) | Time span (k = 3) |
|---|---|---|---|
\(OP_{1k}^{\pm }\) | [35, 37.5] | [50, 53] | [64, 65] |
\(OP_{2k}^{\pm }\) | [62.5, 63] | [75, 77] | [83.5, 87.5] |
|  | Time span (k = 1) | Time span (k = 2) | Time span (k = 3) |
|---|---|---|---|
\(OP_{1k}^{\pm }\) | [35, 37.5] | [50, 53] | [64, 65] |
\(OP_{2k}^{\pm }\) | [62.5, 63] | [75, 77] | [83.5, 87.5] |