We are given the rate, and now we determine the value Shelia exchanged as follows:
[tex]\text{usd}=\frac{25\cdot0.82}{1.0}\Rightarrow\text{usd}=\frac{41}{2}\Rightarrow\text{usd}=20.5[/tex]From this, we have that Shelia got $20.5 USD from her original $25CD.
(USD = US Dollar & CD = Canadian Dollar).