My father is a famous surgeon who recently sustained a head injury. When we first hired some caregivers, they quoted me a price. However, when I got the bill it was more than double of what I was quoted. My father, the cognitively injured patient, signed off on the hours and bill, but I did not sign the contract since it stipulated more than what was agreed upon. What rights do I,the daughter with full Power of Attorney, have to contest this bill?