This Business Law Assignment discusses the essential elements of a contract, the rule of estoppel, and the application of these concepts in a case study. The case study involves Sunita and her uncle, Mr Property Walla, who had an oral agreement regarding leasing his rental shop at a cheap rate. Sunita spent $18500 on the renovation, but then her uncle refused to perform the contract and notified Sunita to vacate. The article concludes that Sunita can sue her uncle on the ground of breach of contract citing the rule of estoppel and the court would stop Mr Property Walla from refusing to lease out the shop to Sunita.