In order buy into a fast food franchise, Rita pays $300,000 and is required to sign many contracts and legal documents. She now finds that the turnover figures are not as high as represented, and that profits are much less than she had estimated on the materials she had been supplied. Under contract law, there is the principle of 'certainty of contract'. However, are there circumstances where a contract may be 'unwritten' or rewritten due to unconscionability?

Explain with regards to the application of the Australian Consumer Law.