| # | Item | Sold | Price |
|---|---|---|---|
| 1 | Hydraulic calculation of external sewage networks | 6 | 1,19 USD |
| 2 | Engineering systems and sanitation facilities. Part 2 | 2 | 0,83 USD |
| 3 | Hydraulic calculation of storm sewer networks | 1 | 1,19 USD |
| 4 | Drainage and treatment of runoff wastewater | -1 | 3,56 USD |