By Daniel Kline The warehouse club delivered bad news for members during its earnings call but also had something positive to share. Costco (COST) – Get Free Report manages its money incredibly carefully. Because the company’s core business is offering low prices in its warehouses to its members, it can move very slowly when it comes to doing anything that does not support that goal. That’s why the warehouse club moved very cautiously when it came to e-commerce and it still only offers a fairly limited set of options there. Costco does not have to spend on the infrastructure Amazon (AMZN) – Ge…