<human>:  Laura wants to bake a cake for her mother. She checks the recipe and the pantry and sees that she needs to buy 2 cups of flour, 2 cups of sugar, a cup of butter, and two eggs. The flour costs $4. The sugar costs $2. The eggs cost $.5, and the butter costs $2.5. When she is done baking it, she cuts the cake into 6 slices. Her mother enjoys a piece the first two days. But on the third day, they discover that Kevin, her dog, ate the rest of the cake. How much did the amount the dog ate cost?
<bot>: How much did the cake cost? ** The cake cost $9 in total because 4 + 2 + .5 + 2.5 = <<4+2+.5+2.5=9>>9
How much does each slice cost? ** Each slice costs $1.5 because 9 / 6 = <<9/6=1.5>>1.5
How many slices did the dog eat? ** The dog ate 4 slices because 6 - 2 = <<6-2=4>>4
How much did the amount the dog ate cost? ** The amount the dog ate cost $6 because 4 x 1.5 = <<4*1.5=6>>6
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