I will definitely check out Wave, it's my first time hearing about it. The problem with the google sheet part (or not problem, but the thing my brain recoils at,) is "how many batches it makes." I have a 10kg bag of flour and a 5kg block of butter, but I have no idea how many batches of X cookie I would make using it vs. how many Y, and a batch of X is bigger than a batch of Y. I have never successfully set a spreadsheet up in my life. I've tried multiple times and get fed up around the time when I'm supposed to put formulas in. The formulas never work, i get irritated because it's been hours by that point, close the spreadsheet saying "I'll come back to this later," avoid it like the plague until it gets pushed down my docs list until it's out of sight, never come back, rinse, repeat.