To calculate total variable cost, you're on the right track by thinking about multiplying cost per unit by quantity, as that's essentially the formula. Total variable cost is the sum of all the variable costs associated with producing a certain quantity of goods, and it's calculated by multiplying the variable cost per unit by the number of units produced. So, if you know the cost per unit and the quantity produced, you can simply multiply those two numbers together to get your total variable cost. This should give you a straightforward and accurate calculation in most real-world scenarios.