How does one work out the expenses made?

There is a need to have a complete list of the expenses made.

This will require sitting down and looking at the various spends made by the family.

These need to be listed out one by one so that nothing is missed out.

There could be a need to revisit this over and over again to include items not considered earlier.

The final list would then be available and this is a better way to ensure that all items are included..