Answer:
$3
Step-by-step explanation:
Retail Price = $35
Marked-down Price = $27
Partial Markdown cancelled price after sale = $30
Partial Markdown Cancellation = Price after sale - Marked-down price
Partial Markdown Cancellation = $30 - $27
Partial Markdown Cancellation =$3
So, the amount of markdown cancellation per unit when the beds were re-priced after the week-long sale is $3.