I know a few local supermarkets sell frozen chickpeas in bags of 500 grams. And I think, off the top of my head, the price ranges between 15 dkk ($2.24) and 40 dkk ($5.97), depending on if there's a sale on and which supermarket I go to. I know that Rema 1000 is on the cheaper end, and frozen vegetable products tend to go on sale pretty often, but it's never the same products, so it's very unpredictable when chickpeas go on sale. These prices include tax, as tax is not excluded from products in stores.

That means that 3 kg of frozen chickpeas would be between $14.44 (uaually when on sale) or $36.02.

Now, I can get dried beans and peas in much larger bulk from the various Arab stores in Copenhagen, but buying bags of dried goods from those stores comes with the risk of getting pantry moths. I'm still battling those little fuckers from the time I bought a large 5 kg bag of really high quality rice two years ago.