随着服装市场竞争日益激烈,某品牌服装专卖店一款服装按原售价降价a元后,再次降价20%,现售价为b元,则原售价为( )
A: a+54b 元
B:( a+45b )元
C:( b+54a )元
D:( b+45a )元
例:—How many pencils do you need?
—I need four pencils.
—How much are they? two dollars for one
—They are eight dollars.