Job this solves
Divide a total equipment budget between machine and grinder by your chosen shares.
Formula
Machine = total × machine % ÷ (machine % + grinder %); grinder = total × grinder % ÷ (machine % + grinder %).
Assumptions
Defaults are starting points, not recommendations. Outputs inherit your inputs.
Common questions
Why not a fixed 60/40 rule?
Class and workflow differ. Semi-automatic espresso often needs grinder budget; super-automatics may not.
Do percentages need to total 100?
No. Shares are normalized by their combined total — e.g. 65/35 and 50/50 on the same budget yield the same split.