To find out how much each bracelet costs to make, we need to determine the cost in relation to the selling price and the percentage given.
Let the cost of materials for each bracelet be \( x \).
According to the problem, Mandy sells the bracelets for 250% of the cost of her materials. Therefore, the selling price can be expressed as:
\[ \text{Selling Price} = 250% \times x = 2.5 \times x \]
We also know that the selling price is $5:
\[ 2.5 \times x = 5 \]
Now, to find \( x \), we can divide both sides by 2.5:
\[ x = \frac{5}{2.5} = 2 \]
Thus, each bracelet costs $2 to make.
Therefore, the cost of each bracelet is:
\[ \boxed{2} \]