I worked as a producer or a fairly well known photographer and there was always an initial fee for your time shooting. There was also an agreement that said prints and files were additional. The photographer I worked with charged $150 per finished file, yes, it is standard for the label to look at unedited images, however, basic adjustments were done to make them look more polished. Once the fee is given for the file rate, those 26 images will be knocked down to 5, but they will want them fast.
I would figure out your rate based on how long it will take you to complete editing for each individual image. Typically, the agreement that was worked out prior to the shoot would only allow the use of images pertaining to whatever the project was for. So, if it was for cd/album packaging, the label could use the images in conjunction with any promotion for that album, so that includes web banners, actual packaging , anything related to the promotion and release of that album.
I hope this helps.