Add to a calculation

[Raymond Gonzalez]

Hello! i have a book inventory database. There is a "quantity" field, that is a calculation of the books that i recieved by shipping minus the books i sold. What happen? sometimes i want to add books or remove books randomly, without storing it as sold or as recieved, how can i do that? thanks!

[Raymond Gonzalez]

Hello! i changed my mind, what i want is to store in another database, what i added randomly and when i added it, but when i click the button "add" i want to store it in a new record and to clear the field in the layout, please let me know if its not clear, thank you very much.

[mr_vodka]

I am still not following Sorry. Can you try to get us some more details?