What is the suggested (from this group) mark-up on alloy?
We used to do 30% of cost and when weighing add .2g for each sprue.
Depends on how sloppy you are as to how much you need to markup or add. And how big/thick your cutting disc is.
Weigh before cutting and then the total after cutting and see how much you lost per cut. Then calculate how much you loose on splatter. We all lose some, but a good average measurment of your casting well for 1 year may be around 50-150g for various reasons.
What markup do you need to pay for that and still make your target profit off of it?
Somewhere I have a chart...
Edit: er... somewhere I had a chart.