#### Explanation:

Since there is a 50% discount on the price, the new price is 100%-50%=50% of the original price.

Let the original price be $x$. Then we have:

x*50%=$2.25 x*1/2=$2.25

x=$2.25*2 =$4.50

So, the bottle of hand lotion's original price was \$4.50.