There has been data ("宅配便は「8分間に1個」「30円の利益」を運んでいる!? 儲けの「しくみ」を原価率と利益率からよむ経済学入門 (JBシリーズ)") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Tue Jun 18 08:13:48 2019, so the data displayed here has been removed .