Short Answer explanation only.

Delaram goes to Aritzia clothing and shoe store in which she sees a SALE sign. While she is looking round, she notices that a sign that says 50 percent off has been placed against a pair of knee-high boots. She takes the pair of boots to the cashier. The cashier refuses to sell the boots at the 50 percent discount and tells Delaram that the store made a mistake. The boots are not on sale but at regular price. What can Delaram do in such case? Can she require the store to honour the advertised sale price of 50%? Please explain your