Bomber damage query

[SeaKraken]

I have a question regarding the bomber damage. I've seen the bomber drop about 3-4 bombs on its run. It's stats mention a damage of 10,300 ( i have the zepplin mk.2) Is this the damage per bomb dropped or a combined damage per bombing run?

 

[Manifesto]

The stats are listed as damage per second - so it's per second.