Create a JavaScript program with HTML and CSS that displays a list of different food options when the user hovers over a specific button element. Each food option should be displayed in a box with an image and a short description. The boxes should be styled with a border and background color to make them stand out. When the user clicks on a food option, the program should display a longer description of the food and a button to add it to a cart. The cart should keep track of the selected items and display the total cost.
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