Why is it important to keep the relevant range in mind when predicting total costs?

The relevant range is crucial when predicting total costs because it defines the level of activity over which fixed and variable cost behavior remains consistent. Outside this range, costs may change, making predictions inaccurate. Understanding the relevant range ensures that businesses can effectively budget, forecast, and make informed decisions based on expected production levels. Ignoring it can lead to miscalculations in overall costs and impact financial planning and profitability.