Answer:
The original price was $150
Explanation:
$120 and 80% symbolize eachother. There is 20% missing from 80% and $120. To find the 20%, divide 80% by four and divide 120 by four to get $30.
$30 is the 20% we were missing. then, we add those to the already existing numbers. $120+$30=$150 and 80%+20%=100%.