Answer:
$21
Explanation:
Crystal Vase was originally priced as $100
80% off: 80% = 80/100 = 0.80
100 x 0.80 = 80
Subtract the amount that is off from the original amount:
100 - 80 = 20
Add sales tax. Sales tax is 5% or 0.05 of the amount.
20 x 0.05 = 1
20 + 1 = 21
$21 is your answer.
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