Profit and Loss – Finding profit from total monthly sales with a target margin: A salesman expects a gain of 13% on his cost price. If in a month his total sales (revenue) are ₹ 791000, what is his profit?

Introduction / Context:
When the target gain is a percentage of cost price, relate SP and CP via SP = (1 + margin) * CP, then back out profit from the given sales.

Given Data / Assumptions:

• Margin on cost = 13%
• Total SP = ₹ 791000

Concept / Approach:
SP = 1.13 * CP ⇒ CP = SP / 1.13. Profit = SP - CP.

Step-by-Step Solution:
CP = 791000 / 1.13 = 700000Profit = SP - CP = 791000 - 700000 = 91000

Verification / Alternative check:
13% of 700000 = 91000; adding to CP gives SP 791000.

Why Other Options Are Wrong:
Other values do not match 13% of the implied CP.

Common Pitfalls:
Treating margin on SP instead of on CP.

Final Answer:
₹ 91,000