I am importing records into my airtable via a zap. The application at the other side of the zap allows users to submit their vehicle mileage firstly in the morning and then in the evening. A row/record is created for the start mileage, then another for the end mileage. There is a column for date, user, start mileage, end mileage.
What i would like to achieve is to automatically calculate the daily mileage for each user on each day. So I need to match records that have the same date and user, then from this subtract the start mileage from the end mileage.
Can anybody point me in the right direction if this is possible and if so, how it could be done?