蓝书上171页248题

chongov

248.                                         Company X        Company Y
Price                                           $575                    $530
Surchase as a percent of price          4%                       3%
Installation Charge                        $82.5                  $93
The table above shows the various charges made by two companies for the same air conditioner. What is the total amount that can be saved on the purchase and installation of the air conditioner by dealing with the company that offers the lower charge?
正确答案 A $41.6
我的选项 B $45
感觉自己还是没有理解题意。
自己是这么算的：
(575+82.5)*0.04=26.3
(530+93)*0.03=18.69
26.3+18.69=44.99≈45