Olive buy clothe at a tore with a total bill of $54. 50. She ha a 20% off coupon and pay 7. 5% ale tax. She calculate the total cot of the clothe, uing the expreion: (54. 50÷1. 20)(1. 075). Explain the error in Olive' reaoning. Determine the correct expreion and explain your reaoning