Sheila charged $85.00 worth of merchandise on her credit card.  She ended up returning one item that cost $15.00.  After she returned the item, she bought a frying pan that was on sale for 20% off $20.00 and a set of towels that was 10% off $30.00.  She put both of these purchases on her credit card.  What is the new balance on her credit card?
Please reason step by step, and put your final answer within \boxed{}.
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