Costco Wholesale font here refers to the font used in the logo of Costco Wholesale, which is a warehouse club that provides a wide selection of merchandise, founded in 1983 in Seattle.
The company logo was probably designed based on Futura Extra Bold Oblique, manually slanted and extended. Futura is a commercial typeface by Paul Renner available in multiple weights and you can view more details about it here.
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The Futura font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.