1. **State the problem:** We need to find the difference in cost between 300 g of potatoes and 300 g of carrots using the graph. 2. **Read the costs from the graph:** - Cost of 300 g of potatoes is approximately 27 p. - Cost of 300 g of carrots is approximately 15 p. 3. **Calculate the difference:** $$\text{Difference} = 27 - 15$$ 4. **Simplify:** $$\text{Difference} = 12$$ 5. **Interpretation:** The cost of 300 g of potatoes is 12 p more than the cost of 300 g of carrots.