###Human: A mum ordered 80 cupcakes for her daughter's birthday. Half of them are gluten-free. There are 24 vegan cupcakes and half of them are also gluten-free.  How many are non-vegan cupcakes that also contain gluten?, ### Assistant: The gluten-free cupcakes are 80 / 2 = 40.
The vegan cupcakes with gluten are 24 / 2 = 12.
The non-vegan cupcakes with gluten are 40 - 12 = 28. 
 So the answer is :  28