adobe photoshop - exporting layers to files and applying the background image to all layers

I have a file with about 80 layers that I want to export to png's. That bit I know how to do but what I'm stuck with is how to include the background layer with every layer being exported? Each layer is on a transparent background but I want them all to have a logo which I only have on the base layer. Am I making sense? Any help appreciated!

Thanks