Well, some things that Alex could do is, he can increase the prices of the Pretzel slowly, getting the customers to get accustomed to the increased price! Some feedback you could give him would be: People love your pretzels more than others due to the fact that you have extra ingredients on them, keep the ingredients and increase the price of the pretzel so that you can keep your profits with your fantastic pretzels.
I hope I was able to help you, but Business isn't my 'forte', but if there is anything else you need help with, please let me know so that I can further assist you.