Answer:
3.36 dollars
Explanation:
Original price is 2.80 dollars
we take 20% of 2.80 aka the original price.
(p.s 20% in just
since % sign means divide by 100)
so,
=

=0.56
This means that 20% increase results in 0.56 increase in dollars
So the price after this increase would become
2.80 + 0.56
=3.36 dollars
hope that helped