There are 48 students in class 2 of the sixth grade. During the reading and newspaper reading activities, the class committee decided to buy a book priced at 8 yuan per person. The bookstore will sell 90% of the price for those who buy 50 or more books. With the above information, design the best purchase plan that you think is reasonable. And calculate the amount of money the class spends on buying books.
六年级2班有48名同学，在读书、读报活动中，班委决定每人购买一本定价8元的书，书店对购买50本及50本以上者，按定价的90%出售，根据以上信息，设计出你认为合理的最佳购买方案．并计算出全班买书所花钱数．
<result>50</result>