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 50% 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% 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%? EXPLAIN