I am trying to send.keys a value that I calculated and then click the save button but the value isn't saving, why is this?

The value I want to calculate is being calculated properly, and the value is being sent and I can see it being typed, but when I click the save button, the value isn't saving.

When I go back to look at the value it isn't there.

How do I change this?

Correction - it saves some times but it doesn't other times, I don't get it.