list four items of information necessary to constuct a break-even chart.?

Answer 1

It's years since I produced one of these. Err.....

1. Unit Cost
2. Unit Price
3.
4.

Answer 2

This is your 4th homework question I've seen .. how about reading some of the material / attending some of the classes ?

... or learning how to use Wikipedia / Google ??

Anyway the answer is (or perhaps not = how will you know ?)
1) Fixed Costs
2) Variable costs
3) Sale price per item
4) Relationship between Sale price and number oif items sold