Question: Mean heating cost for gas: (6.1 + 7.2 + 5.4 + 5.8 + 6.3 + 6.7 + 7.4 + 6.4) / 8 = 6.4125 Mean
Mean heating cost for gas: (6.1 + 7.2 + 5.4 + 5.8 + 6.3 + 6.7 + 7.4 + 6.4) / 8 = 6.4125 Mean heating cost for electricity: (8.2 + 7.5 + 8.7 + 7.4 + 7.8 + 9.2) / 6 = 8.133333333 Mean heating cost for solar: (5.2 + 6.1 + 5.7 + 5.4 + 6.2) / 5 = 5.72
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