Answer 
Find out the what is the clearance price .
To prove 
As given
The gift shop at manatee mall was having a clearance sale. 
everything was marked down 30%. 
The original price of a manatee hat was $18. 
30% is written in the decimal form

= 0.30 
Than 
The clearance price = 18 - 0.30 × 18
 = 18 - 5.4
 = $12.6 
Therefore the clearance price be $12.6 .