My sister was inbetween health insurances in her job , and of course , needed emergency gall bladder surgery . The surgeon wanted $ 4000 , they agreed on $ 2000 . She had the surgery , and when she told me the cost , as a Medical Biller I advised her that ins co have fee schedules and would pay between $ 500 and $ 900 depending on the co.
According to the above context, answer the following question.
Why is it necessary to say " of course " my sister needed surgery ?


" Of course " indicates that it is sarcasm and very sad .