Breakeven Sales & Data Tables using Excel

[Flupsie]

I have tried to compute the breakeven sales for a service department
and made use use data tables in Excel to estimate the Net
Profit based on various sales, I get an incorrect answer. The
breakeven sales in the data table should be zero. This has stumped me
as my formula for breakeven appears to be correct

It would be appreciated if you could check my sample data and advise
where I have gone wrong

[Flupsie]

I resolved my problem in computing the estimated Net Profit using data tables.

My Breakeven was 100% but I was getting an incorrect answer when computing forecasted Net Profit based on increased sales data when using a data table.

My Contribution margin was 27.1111% (GP %)

To resolve the problem is incorrect forecasted net profit , I set my variable costs to be Sales * (1-0.271111) and now I get correct forecasted net profit