I have a spreadsheet I made to keep track of my expenses. Similar to this - date; store; km driven; amount claiming; amount of receipt; description

So every trip to Walmart is 13 km's for me. When I do my spreadsheet for all my receipts I have 13 km's for all Walmart trips- put in formula at bottom to add up all totals then I give my accountant my total km's driven for the year. No keeping track of actual km's in vehicle etc. it ends up being a lot by the end of the year