A bundle price that does not undercut yourself

Add the parts, set the discount, and see what a buyer pays versus what you would have made selling them apart.

One price per part

Bundle discount, percent

Copies you expect to sell instead of singles

Parts add up to	-
Bundle price	-
Off, per bundle	-
What those copies would have made apart	-
What they make as bundles	-
Given away, in total	-

Every line above comes out of the boxes you typed. Nothing is stored, nothing is sent, and there is no account behind this page.

A bundle only wins if it replaces sales you would otherwise have made one at a time. If it sits beside them and takes the same buyer's money twice, the discount is a gift.
Nobody buys a bundle of ten things they did not want. Fewer, better, and worth the one price.