Calculate with dates
I want to track the maintenance of our equipment in FileMaker Pro. Some needs maintenance each year, others each 40 days, others...
So, I created three fields: 'Date of maintenance', 'Date of next maintenance', 'Maintenance interval'. Now, I want only to fill in the date of the current maintenance and FileMaker calculates the date of the next maintenance:
'Date of next maintenance' = 'Date of maintenance' + 'Maintenance interval'
I don't get there. How can I achieve this?