The following contribution margin income statement represents the operations of Peroux Company, a small manufacturer, at a level of production of $10,000$ units $($assuming all units produced are sold$)$:

Sales Revenue $$53,000$

Variable Costs $33,000$

Contribution Margin $20,000$

Fixed Costs $15,000$

Net Income $5,000$

The relevant rage for Peroux Company is $4,000$ to $12,000$ units. If production and sales were to decrease to $5,000$ units, which of the following would likely occur?

Unit variable cost and unit fixed cost would not change.

Unit variable cost would not change, but unit fixed cost would decrease.

Unit variable cost would increase but unit fixed cost would not change.

Unit variable cost would not change, but unit fixed cost would increase.