A convenience store chain based in Ankeny is reporting a big boost in profits. Casey’s General Stores Incorporated reported Monday that it earned $33.6 million during its fiscal second-quarter.

That’s an increase of 22% over the first quarter and is up from the $27.3 million earned over the same quarter last year. The company is giving credit to stronger profit margins on gasoline, food and other items in its stores.

Casey’s operates nearly 1,500 convenience stores in Iowa and eight other Midwestern states.