Some fast food restaurants including McDonald's, Chick-fil-A, and Starbucks have been shown selling their products for slightly higher prices on third-party delivery apps, Business Insider reports. A Gordon Haskett analysis obtained by the outlet showed that, for example, a Chick-fil-A sandwich from the same location in Atlanta, GA, would be sold for $4.85 through its delivery partner DoorDash and $3.75 when you order directly at the drive-thru.