Spreadsheet of costs to tally against 60 invoices

I have a spreadsheet of costs for a project.

Every separate cost over £250 needs an invoice / receipt for it.
Every cost under £250 should be itemised / listed but does not require a receipt.

I need someone to check that there is an invoice / receipt matched against every relevant cost and choose a simple way of coding this. Also that the costs add up as we have represented on the spreadsheet.

The idea is that when we send it to funder for audit - it tallies perfectly and there are then no queries.

The spreadsheet is attached and a link to the folder is here. https://drive.google.com/drive/folders/1RCBdA2IPBYYSvdciXKSl1r7wvn8S_A4p?usp=sharing

Please make sure you have reviewed the items before taking on the job. Should only take a few hours.