Hollie Shaw | February 23, 2017 12:39 PM ET

Costco was recently selling three types of women’s deodorant, four toothpaste varieties and 10 shampoo sets, while its competitors sell hundreds of personal care items. About 55 to 60 per cent of Costco’s merchandise changes every few weeks and regularly stocked items might shift in location.

http://business.financialpost.com/news/retail-marketing/inside-the-treasure-hunt-the-five-keys-to-costco-canadas-success