[经] statement accounting for variation in gross profit

xiāo huò máo lì biàn dòng jì suàn biǎo ㄒㄧㄠ ㄏㄨㄛˋ ㄇㄠˊ ㄌㄧˋ ㄅㄧㄢˋ ㄉㄨㄥˋ ㄐㄧˋ ㄙㄨㄢˋ ㄅㄧㄠˇ