I think this can be done, might just need to add a new field!
On table ‘seed packets’, I have a manual number field to log how many seeds in the original packet. On table ‘sowing log’ it calulates how many seeds I have sown by N numbers in N numbers of stations (manually logged, auto answer (I didn’t set it up so language may be wrong).
On the ‘seed packets’ table I appreciate I shall need to create a new field for the answer. I want it to take off the number of seeds sown from the original packet number
I am familer with formulas in excel but not here so please, if someone could give me a simple starter I’d be most grateful; or correct me if I am heading down the wrong path