$8.1 the original price is the sale price.
Given that, the sales price=$30.40 and discount=20%.
What is the sales price?
The price at which something sells or is sold after its price has been reduced.
Let the original price be x.
x-20% of x=30.40
⇒x-0.2x=30.40
⇒0.8x=30.40
⇒x=$38.5
Now, 38.5-30.40=$8.1
Therefore, $8.1 the original price is the sale price.
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