Margo purchases bulk teas from a warehouse and marks up those prices by 10% for retail sale. When teas go unsold for more than two months, Margo marks down the retail price by 10%. She says that she i

Margo purchases bulk teas from a warehouse and marks up those prices by 10% for retail sale. When teas go unsold for more than two months, Margo marks down the retail price by 10%. She says that she is breaking even; that is, she is getting the same price for the tea that she paid for it. Is she correct? Complete the explanation.