Hello!
So, the original price of something is $14.99. There is a discount of 20% on the price. 
A discount is a deduction of money from the cost of something  (you save money). 
This means we'll have to find 20% of the price and then subtract it. 
First, convert the percentage to a decimal by dividing it by 100. 
20% ÷ 100 = 0.20
Now, multiply the price by this decimal. 
14.99 × 0.20 = 2.998
Subtract it: 
14.99 - 2.998 = 11.992
So, the discounted price is $11.992. Now, we need to find how much the sales tax is and add that onto the cost. 
8.25 ÷ 100 = 0.0825 
11.992 × 0.0825 = 0.98934
11.992 + 0.98934 = 12.98134
This can be rounded to 12.98. 
ANSWER: 
The final price is $12.98.