

I’m going to say something controversial. You could change your system to base 10, by simply stopping after 9 and using the other hand as the “tens”.
This could be easier to see at a glance what number you are holding, it should become the industry standard




The rule is that if its soft food as bread or jelly, its all compromised and should be thrown. If its hard like cheese, you can cut the mold and consume since the mold probably didn’t get that far inside