How much is the monthly fee for Pandora?

Could you please clarify for me the monthly fee structure for Pandora? Is there a fixed fee that applies to all users, or does the fee vary depending on factors such as usage or subscription tier? Additionally, are there any discounts or promotions available for new subscribers or those who commit to a longer-term plan? I'm interested in understanding the cost structure in detail before making a decision. Thank you for your assistance.