[WirelessGigabit]

A basic Costco membership is $60. Their chicken is $5 + tax. Same chicken at Safeway is $8.99 + tax.

So if you eat >15 chickens per year Costco is cheaper.

And even that is incorrect. Costco's chicken is 32oz, the Safeway one 28. Forgetting about taxes, Costco's is $0.15625 / oz, Safeway is $0.3210714285714286 / oz.

So now we have 2 equations, and we need to find the intersection:

* y = 60 + x * 0.15625

* y = 0.3210714285714286 * x

They cross at 11.37594799566631 chickens.

But larger chickens have larger bones, so let's keep it at 15. I definitely eat more than 15 chickens per year.

Then there's the issue of cost in general, while the house-brands of Safeway / Frys / Kroger / ... are cheaper, they are much more likely to have stuff added to it to make it 'bulkier'. A good example is Cottage Cheese from Walmart. They add a thickener to the liquid which allows them to sell you the same amount for less, but you actually get less cheese and more filler.

[arroz]

Walmart chicken is the same price as Costco and you don’t need a membership

I don’t know if the cottage thing is true or not, but even if it is, it doesn’t make difference for the customer if their goal is to save money

[WirelessGigabit]

The problem with saving money is that they're replacing nutritious stuff with filler. So cheaper per oz, but you get a worse product.