The Apple store does not accept cash for ipads or iphones
Apple's iPad purchase policy states the company only takes two forms of plastic that Campbell doesn't have: credit or debit cards. In other words, dollars won't work, neither will gift cards:
"iPad purchases are limited to 2 per customer and must be purchased with a Credit Card or Debit Card only."
Apple's iPhone payment policies are similar:
"iPhone purchases are limited to five iPhones per customer and must be purchased with a Credit Card, Debit Card or Gift Card."