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Remeasurement Items affecting operating profit - Assumptions (Details) | 12 Months Ended
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Jun. 30, 2024 R / $ $ / gal $ / bbl $ / T $ / kJ | Jun. 30, 2023 R / $ $ / T $ / kJ $ / gal $ / bbl | Jun. 30, 2022 R / $ $ / bbl $ / T $ / gal $ / kJ
Impairment assumptions |  |  |
Period over which management has projected cash flows | 5 years |  |
Long-term average crude oil price (Brent) | 83.06 | 88.02 | 93.24
Long-term average ethane price | $ / gal | 0.3955 | 0.4233 | 0.4315
Long-term linear low density polyethylene (LLDPE) | $ / T | 1,091.00 | 1,247.00 | 1,179.00
Long-term average refining margin | 8.11 | 12.34 | 12.23
Long-term average exchange rate | R / $ | 17.64 | 17.40 | 15.95
Future oil price period (in years) | 5 years | 5 years | 5 years
Future linear low density polyethylene price period (in years) | 5 years | 5 years | 5 years
Future exchange rate period (in years) | 5 years | 5 years | 5 years
Future ethane price period (in years) | 10 years | 10 years | 10 years
South Africa |  |  |
Impairment assumptions |  |  |
Long-term average Southern African gas purchase price (real) | $ / kJ | 0.00001051 | 0.00001093 | 0.00000894
Growth rate - long-term Producer Price Index | 5.50% | 5.50% | 5.50%
Weighted average cost of capital | 15.00% | 15.20% | 14.41%
United States |  |  |
Impairment assumptions |  |  |
Growth rate - long-term Producer Price Index | 2.00% | 2.00% | 2.00%
Weighted average cost of capital | 9.40% | 9.07% | 8.13%
Europe |  |  |
Impairment assumptions |  |  |
Growth rate - long-term Producer Price Index | 2.00% | 2.00% | 2.00%
Europe | Minimum |  |  |
Impairment assumptions |  |  |
Weighted average cost of capital | 9.40% | 9.07% | 8.13%
Europe | Maximum |  |  |
Impairment assumptions |  |  |
Weighted average cost of capital | 10.50% | 10.68% | 9.57%

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