The formula to calculate the Calories Burned is:
\[ \text{Calories Burned} = \frac{\text{Weight in pounds} \times \text{MET} \times \text{Time in minutes}}{60} \]
Where:
Let's say a person weighs 150 pounds and spends 30 minutes pulling weeds. Using the formula:
\[ \text{Calories Burned} = \frac{150 \times 4.0 \times 30}{60} = 300 \text{ kcal} \]
So, the person burns 300 calories.