Following on from Tim's comments about Profit in the Lambing Percentage thread...
What methods do folk use to work out their profit, or other financial factors like cost per lamb, cost per ewe etc.
I record all my outgoings and sales in spreadsheets, and I try to split it all into "lambing crops", so I know how much each lamb has cost me (as this varies year on year). Trouble I have is working in the costs of things like Rams or medicines that might be used over more than one year. I want to upgrade to using a database (either a bought in one or, as I am that way inclined and not wanting to spend money, I might write my own), but I need to work out the best way to record the data I need in order to analyse it in the way that I want. All my sheep are EIDd so I guess it would be possible to work out exactly how much each individual lamb costs me, if I record the medicine administration details in my db.
I would be interested to hear what everyone else does, and what software they use (if any).