Who’s in charge of the butter?

So, me mum is now out of the country for a bit and all I can think about is that I am now in charge of the butter supply.
I love butter…butter, rice, yogurt, and sugar…faaaaaaaaantastic. So, I was putting some butter on some food when I realized…that won’t be getting refilled automatically anymore. What happens if the supply starts to run out?
I came up with a whole bunch of formulae in order to chart the performance of butter vs time. I think I’ll be good for a bit but it’s about time that I made sure that I had enough of a butter backup.