Question

Mr. Suresh went into a restaurant and had a lunch worth Rs. 162. He paid using a 500 rupee note. Happy with the meal, he then bought a mini snack box for Rs. 37 and paid using a 100 rupee note. In both cases, Suresh collected his balance change from the cashier, and he did not pay any tips. The next day, when the cashier deposited the money in the bank, the banker found that only the two currency notes given by Suresh were counterfeit. As per policy, the bank tore up both notes on the spot. What is the total loss to the restaurant in this transaction?

• A. 1200
• B. 600
• C. 7991
• D. None of the above

Hint:

Add up both the change given back and the value of food and snack served.

Answer 1

The Correct Option is B

Step 1: Track the restaurant's cash box before and after, instead of splitting goods and change.
Before Suresh arrived, say the cash box has $M$ rupees. He hands over a fake 500 rupee note, worth nothing in real terms, and receives Rs. 338 change from the box, so the box now holds $M - 338$ rupees, plus one worthless note.

Step 2: Repeat this for the second transaction.
He hands over a fake 100 rupee note, again worth nothing, and receives Rs. 63 change, so the box drops to $M - 338 - 63 = M - 401$ rupees, plus a second worthless note.

Step 3: Account for the food and snack given away.
On top of this Rs. 401 cash shortfall, the restaurant also served a Rs. 162 meal and a Rs. 37 snack that it was never really paid for, a further Rs. 199 in goods.

Step 4: Add the cash shortfall and the goods given away.
Total loss $= 401 + 199 = 600$ rupees, the same figure as the other method, confirming the answer.

Final Answer:
The restaurant's total loss is Rs. 600. \[ \boxed{Rs.\ 600} \]