Just a small note, all membership dues and/or fees from winning auctions, etc must be placed in an envelop and labeled when paying for them. Otherwise loose money in the cauldron has no way of being identified as to who put it there.
Unfortunately if you put money in the cauldron without labeling, but it was to pay for something specific, it cannot be counted towards that due.
Folks who pay online have an easier time because we can track those transactions electronically, but it still helps to label in the comments what that money is for.