That $3.65 is not the regular in-store menu price. DoorDash charges something like a 30% commission to the restaurant, so the restaurants mark everything up by at least that amount. Then at checkout time, you get nailed with surcharges ("operating fee", etc.), sales tax, and the delivery fee. Even with the default (~10%ish) tip, it usually works out to roughly 35% of your original subtotal (with the commission pricing factored in). That same taco will cost you significantly less at the drive-thru -- looks like it should be $2.79, which is still highway robbery, but yeah. (Also, that's a roughly 30.8% markup.)