Excel purchase/sales ledger sheet

Hi There,

I need the attached sheet to work for latest version of excel. Essentially recreating from scratch so it works properly.

The original guy who built it has had it returned 4 times because the names field stopped working, the expense tab didn't work properly and now when you add expense for the month of Feb it does not reflect on profit tab...

I just need this to work, on all versions of excel and using calculations that are simple to amend rather than (appearing to be) so difficult that only the original developer can make changes...

I am an excellent person to work with, check my feedback. Look forward to working with the right person very soon.

I need the job done by 4pm GMT tomorrow. :-)