What is the total cost of the sirloin steak and the roast beef for George and Sheila, including the drinks?

Analysis:

• The image displays a dialogue between George, Sheila, and a waiter in a restaurant.
• The prices of some items are visible at the bottom left of the image: £5.95, £7.95, and £6.25.
• The dialogue states that George wants the roast beef, and Sheila wants the chef's salad.
• The waiter confirms their order: "Yes. We'd like the chef's salad and the roast beef, please."
• George orders "a glass of mineral water".
• Sheila orders "a lemonade".
• The image does not explicitly state the prices for the roast beef, the chef's salad, mineral water, or lemonade.
• The prices visible (£5.95, £7.95, £6.25) are not directly linked to the ordered items in the dialogue.

Conclusion:

• The exact cost of the sirloin steak (which George initially considered but then ordered roast beef) and the roast beef cannot be determined from the provided image.
• The prices of the chef's salad, mineral water, and lemonade are also not specified.
• Therefore, the total cost of their order, including drinks, cannot be calculated.

Answer: The total cost cannot be determined from the information provided in the image.