1. **State the problem:** We need to find the Total Cost (TC) when producing a quantity of 5 units. 2. **Recall the formula:** Total Cost (TC) is calculated as $$ TC = ATC \times Q $$ where $ATC$ is the Average Total Cost per unit and $Q$ is the quantity produced. 3. **Identify given values:** - Quantity $Q = 5$ (point A) - Average Total Cost $ATC = 31$ (point D) 4. **Calculate Total Cost:** $$ TC = 31 \times 5 $$ $$ TC = 155 $$ 5. **Interpretation:** The total cost of producing 5 units is 155 (rounded to the nearest hundredth or thousandth as 155.00). **Final answer:** $$ \boxed{155.00} $$