On his way back from work, Kelvin decided that he needs a pair of a denim jacket. He entered Viva Jeans, a clothing store at Suria Sabah mall, and picked up a pair of a denim jacket. Kelvin was about to place it on the cashier's deck when he realized that he did not have enough money as he forgot to bring his wallet. Kelvin put the denim jacket back on the display rack. While doing so, the cashier stopped Kelvin and told him that he had contracted to buy it and must pay for it. Advise Kelvin.