\[ \text{Bill (PKR)} = \big(E_{\text{(kWh)}} \times R_{\text{(PKR/kWh)}}\big) + C \]
Where:
• \(E\) = Energy Consumption (kWh)
• \(R\) = Tariff Rate (PKR per kWh)
• \(C\) = Additional charges/taxes (PKR)
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