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Unit costs and total costs of the hybrid system (in Euros).
| Mattress systems | Lifecyle period (in years) | One‐off acquisition costs per unit | Maintenance per unit (per year) | Depreciation per unit (per year) | Total costs (per year) |
|---|---|---|---|---|---|
| Mattress | 5 | 1750.00€ | 0.00€ | 350.00€ | |
| Pump | 5 | 975.00€ | 140.00€ | 97.50€ | |
| Total | 2725.00€ | 140.00€ | 447.50€ | 68,150.00€ |
