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Fixed and variable costs for 5 hours’ oxygen usage per day for 1 month at a flow rate of 2 l/min for both concentrator and cylinder
| Costs | Rate (£) |
|---|---|
| Concentrator | |
| Fixed: | |
| Installation | 44.85 |
| Back-up cylinder | 3.14 |
| Variable: | |
| Rental | 15.89 |
| Electricity | 10.85 |
| Total cost | 74.73 |
| Cylinder (1360 litres) | |
| Fixed: | |
| Service installation | 9.90 |
| Service withdrawal | 8.87 |
| Variable: | |
| Ingredient | 97.72 |
| Dispensing fee | 44.35 |
| Delivery allowance | 45.55 |
| Flow head rental | 1.93 |
| Total cost | 208.32 |
