Help with a Recording artist shoot.?

how much do you charge for regular photos? for publicity pictures i would say charge close to normal. for a poster shot maybe one and a half of normal(ex. if the normal was 100$ charge 150$) and for the record cover charge double. i dont know how difficult each thing is, so you might not want to follow this. just trust your instincts. dont do what you feel is too low. if they wont pay you because the think its too high go a little lower. but if they want you to go too low, walk away. unless you really need the money. just set a limit of how low you will go and dont go past it. because if they think you will go as low as they want you will basically get robbed.