A rule for the shutdown decision: 'price < minimum average variable cost, then firm shuts down.' What does it say happens when price exactly equals the minimum average variable cost?

1. The shutdown rule as a pair of conditions based on comparing price with minimum average variable cost. 2. When price is strictly below minimum average variable cost, the firm shuts down. 3. When price exactly equals minimum average variable cost, the firm stays in business rather than shutting down. 4. At that exact price the firm can just barely cover its variable costs, which is enough to keep operating in the short run. _Source: OpenStax Principles of Microeconomics for AP Courses (CC BY 4.0), Ch 8 "Perfect Competition", section 8.2 | How Perfectly Competitive Firms Make Output Decisions_