Since by definition, fixed costs are not expected to change as volume of output changes within the relevant range, fixed costs remain the same at all three projected levels of output. Revenue and variable costs vary with output in a linear fashion. Hence, when output increases 100% from 10,000 units to 20,000 units, revenue, each line-item for variable costs, and contribution margin all increase 100%.
Static Budget Variance at Guess Who Jeans:
Guess Who management decides that 10,000 units is the most likely output volume, and sets the static budget based on this sales and production level. After the end of the month, company personnel prepare the following table, showing the static budget, actual results, and the static budget variance.