WILLOW CREEK CAFÉ — LUNCH MENU Turkey & Swiss Sandwich — $8.50 Grilled Vegetable Wrap (vegetarian) — $7.75 Tomato Basil Soup — $5.25 Caesar Salad — $7.00 Add a cup of soup to any sandwich for $2.00. All sandwiches served with a side of chips or fruit. Please inform your server of any allergies.
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According to the menu, how much does it cost to add a cup of soup to a sandwich?