I just found that if your go to the game directory there’s a folder called “Inventory” with one file in it that can be opened with notepad. Within the file you can change the cost of provisions and how much you can carry of each. I suggest making a backup of this file in case you want to go back to defaults at some point. You can even change the cost of what items and rewards are worth. Note that “Food” is labeled as “provision” within the file.