Answer:
$50.05
Explanation:
To get the answer you multiply the 91 by .45 and subtract the result from 91.
In this case, you get 37.31 and you subtract that from 91 to get 53.69.
Now I didn't get this right on my end so I'm gonna look back and check how to properly do it, but upon checking my work with good ol' Google the answer I got is 50.05 as the price with 45% off deal.