Last month, an electric meter read \( 7835 \mathrm{~m}^{3} \). This month, the reading is \( 8328 \mathrm{~m}^{3} \). If the basic cost of cubic meter is Php 3.40 per \( \mathrm{m}^{3} \). How much is the basic bill? A. Asked: How much is the bill? B. Given: The reading is \( 8328 \mathrm{~m}^{3} \) C. Operation subtraction \& multiplication

To find the bill, first calculate the difference in readings: \(8328 \text{ m}^3 - 7835 \text{ m}^3 = 493 \text{ m}^3\). This is the volume you used for the month. Now, multiply that volume by the cost per cubic meter: \(493 \text{ m}^3 \times 3.40 \text{ Php/m}^3 = 1,678.20 \text{ Php}\). So, your total bill is Php 1,678.20! When it comes to these calculations, a common slip is forgetting to subtract the initial reading from the current one. Always double-check your readings before you multiply! It’s easy to make a mistake when you're focused on the bill amount instead of the actual usage. Keep your numbers straight, and don’t rush; precise calculations make for peaceful billing!