This falls into the category of useless information. Pure 'bait and switch' material. What you really want to know is the TOTAL COST.
Do you buy cars by the pound? I would not think so. Everyone can relate to automotive references, but they only go so far. There may be 3 Honda dealers all selling the exact same model. Only the dealerships differ. Not so in stone. Everyone may start with ubatuba, but the results can vary wildly. And, even atrociously.
Big box stores are notorious for luring you in with the big print and gigging you with the small print. As are a number of the scurrilous wannabees. You are not interested in the starting point, you are interested in the ending point. Bottom line.
Estimating cost, templating cost, edge charge per running inch, trip charge, tear out charge, fixing your cabinets charge, base cost per square foot, laminate charge, installation charge, sink cut charge, undermount charge, stove cut charge, hole drilling charge, fabricating charge, slab cost charge, etc. You get the point. What can start at $36 psf can end up at $57 psf in a hurry.
The summation is, ask more pertinent questions. 'Price per square foot' is the proverbial 'tip of the iceberg'.