To find the total amount of Yasmin's purchase before tax, we can use the sales tax amount and the sales tax rate.
- We know the sales tax rate is 8.75%, which in decimal form is 0.0875.
- The sales tax amount paid is $4.59.
We can use the formula for sales tax:
\[ \text{Sales Tax} = \text{Total Purchase Amount} \times \text{Sales Tax Rate} \]
Using the values we have:
\[ 4.59 = \text{Total Purchase Amount} \times 0.0875 \]
Now, we can solve for the Total Purchase Amount:
\[ \text{Total Purchase Amount} = \frac{4.59}{0.0875} \]
Calculating this gives:
\[ \text{Total Purchase Amount} = \frac{4.59}{0.0875} \approx 52.4 \]
Thus, rounding appropriately, the total amount of her purchase before tax was added is approximately $52.46.
Therefore, the answer is:
\[ \boxed{52.46} \]