Scientists [ Koert van Ittersum , Joost M. E. Pennings and Brian Wansink ] interviewed 300 shoppers , and found that more than half of them try to crunch the numbers without a calculator or even a pen and paper .
科学家们采访了300名购物者，发现其中超过一半的购物者们心里想着缩紧花销，却连计算器都不带，更别说一支笔和一张纸了。
joost