A perfect brown bag lunch is probable a nice sandwich, or a roll with a meat and some salad inside. Also a small carton or juice and maybe some fruit. A small cake or muffin or a small candy bar....
Understand that neither of you is perfect. She may seem to be but only because you like her (a lot). You know what you are - not perfect but no one is. Never undervalue yourself - most people do.
The fact that all the different businesses in this market system are price takers and are in competition with every other firm. They all want their products to be sold, but if one company raises...