A sales manager's salary is Rs. 50,000, but he also receives a 2.5% commission if the sale increases from 3500 units.

Identify the type of cost highlighted here:

Option 1 -> Fixed cost: This would mean the cost remains constant at all activity levels, but the manager's total compensation changes when sales exceed 3500 units, so it's not purely fixed.

Option 2 -> Variable cost: This would mean the cost varies directly and proportionally with activity, but the manager receives Rs. 50,000 base salary regardless of sales volume, so it's not purely variable.

Option 3 -> Semi-variable cost: This cost has both fixed and variable components - a fixed base salary of Rs. 50,000 plus a variable commission of 2.5% on sales above 3500 units.

Option 4 -> Total cost: This is a general term for the sum of all costs incurred, not a specific classification of cost behavior pattern.

Hence, Option 3: Semi-variable cost -> The sales manager's compensation consists of a fixed component (Rs. 50,000 base salary) that remains constant regardless of sales, and a variable component (2.5% commission) that kicks in only when sales exceed 3500 units. This mixed nature of having both fixed and variable elements makes it a semi-variable (or mixed) cost -> correct