Ali was interested in purchasing a business class ticket for his flight from Perth to Nairobi (Kenya) to see the magnificent animals of the Masai Mara. As prices can vary between airlines and times of the year he decided to shop around on the internet first. The best deal he could find was from South African Air (SAA). This fare also promised to give benefits in Johannesburg where he would face a minimum 6 hour wait for the connecting flight to Nairobi. The SAA salesperson quoted a price of $3,200 for the return business class flight. Ali thought this was relatively cheap and promptly gave his credit card details. Two weeks after he had paid for his return ticket he noticed he had been charged $3,900 as there were some "unspecified taxes" added to his bill. He had not been directly informed about this by the salesperson when he paid, but when he made further enquiries with SAA he was told of an exclusion clause that is in all their ticket purchases and readily available on the internet which states: "prices may, from time to time, be subject to change due to unspecified taxes". Was there an enforceable contact here? Will Ali be required to pay the extra $700 and if so, on what grounds? (NB. You are not required to use Consumer Law in this question) ( answer according to IRACC model )