To find out how much money Emerson will make by selling all of the dog treat bags, we need to first determine how many bags she can make from the 408 dog treats.
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Calculate the number of bags: \[ \text{Number of bags} = \frac{\text{Total treats}}{\text{Treats per bag}} = \frac{408}{24} = 17 \]
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Calculate the total earnings: \[ \text{Total earnings} = \text{Number of bags} \times \text{Price per bag} = 17 \times 7 = 119 \]
So, if Emerson sells all of the treat bags, she will make $119.
The correct answer is A $119.