Americans are choking on surging fast-food prices. "I can't justify the expense," one customer says

Kevin Roberts remembers when he could get a bacon cheeseburger, fries and a drink from Five Guys for $10. But that was years ago. When the Virginia high school teacher recently visited the fast-food chain, the food alone without a beverage cost double that amount.

Roberts, 38, now only gets fast food "as a rare treat," he told CBS MoneyWatch. "Nothing has made me cook at home more than fast-food prices."

Roberts is hardly alone. Many consumers are expressing frustration at the surge in fast-food prices, which are starting to scare off budget-conscious customers.

A January poll by consulting firm Revenue Management Solutions found that about 25% of people who make under $50,000 were cutting back on fast food, pointing to cost as a concern.