1) Creating an Estimate for fitting solar panels. 2) Storing orders for farm produce. 3) Stats/engineering calculations

Notes: These 3 are the main 3 that I have seen. i.e.

1) creating estimates. 2) mini database 3) Science/Stats/engineering calculations

I am working on this: www.cellmaster.com.au - so I ask people what they use spreadsheets for all the time.