Answer
$40
Step-by-step explanation
Because the perfume is on sale (70% off), it only costs 30% of its original price.
So we divide the sale price of the perfume ($12) by 30%
12 ÷ 30 = 0.4
Then, we multiply 0.4 by 100
0.4 × 100 = $40
I hope it's correct