The most expensive menu changes, the study says, were at McDonald's, which saw prices double over that timeframe, followed by Popeyes, which had an 81% increase in pricing.

The customer also said the price of Go Buckets had increased to $5.45 after jumping from $3.95 to $4.95 last year, however the KFC website still lists them at $4.95. Price hikes flagged by KFC owner ...