5. If S.P \( =₹ 780 ; C . P=₹ 680 \), then profit is \( \begin{array}{llll}\text { (a) } ₹ 98 & \text { (b) } ₹ 68 & \text { (c) } ₹ 100 & \text { (d) } ₹ 88\end{array} \)

To calculate profit, you subtract the Cost Price (C.P) from the Selling Price (S.P). Here, Profit = S.P - C.P = ₹ 780 - ₹ 680 = ₹ 100. So, the correct answer is (c) ₹ 100. Now isn't that satisfying? Knowing how to find profit and figuring out where you're earning can make a huge difference in business decisions. Keep practicing these calculations, and you'll become a financial whiz in no time! Moreover, understanding profit isn't just for selling products—it's key for budgeting in personal finance too! Whether you're planning a dinner party or a vacation, knowing your income vs. expenses helps you keep your financial goals on track. Happy calculating!