No logbook but partial spreadsheet, will SARS accept this?

I've lost my logbook but have compiled a spreadsheet containing most of the information and trips from memory and other sources. I have my km for the beginning and end of each month, but not for each trip separately. I need to submit my documents through to SARS for audit, but I'm not sure if this will be acceptable? Will they decline my travel claim?

SARS requires a detailed logbook, so they will just disallow your travel claim if you submit a partial logbook.