Hello everyone! So I'm working on constructing a simple mass balance for a cake. I didn't have any problems doing that, but I was asked about waste that is generated in the process of making the cake. Is there really a waste generated in this kind of process? I've also been asked to discuss how the amounts of waste generation changes when it is being produced in a factory setting. Here is the materials that I'm using for the cake: Flour, eggs, oil, water, baking powder and heat I was thinking that egg shells will be generated as waste. Thats all I came up with. Please give me some advice if you have any. Thanks.