Unsure about Pricing Logos and Children's Book Illustrations

Hello!

Recently, I have been asked for two commissions, and I'm not sure how to handle pricing them. I purchased the Graphic Artist's Guild Handbook, but I can't seem to find a case that relates to the first one. I could be overlooking something, though!

1) Someone has asked for me to draw a logo, a mascot, and 4 pieces of art relating to their business. The 4 pieces are just going to be various electronics on transparent backgrounds. I'm not sure what to quote for a price, so I looked it up online, but I could only find prices just for logos and not for the mascot or the 4 extra pieces. I thought that mascots would fall under logos, but I'm not completely sure about that. All of the art will be used in signs and on their website. What do you think I should charge for this amount of work (logo, mascot, and 4 pictures of art)?

2) I have been asked by an author to draw illustrations for their children's book. I saw something pertaining to this in the handbook, but I'm at a loss because they want 40-50 pictures. I have no idea what to charge for that amount. I received advice that said I should charge a different amount per a page in case the author wants more detailed pictures for some of the pages. I'm going to meet with the client Sunday, so I will update the post with any new information. What would be a good price for a commission this size or what should I charge per a page?

Thank you for your help!

EDIT: Case #1 went through. Case #2 is in limbo. The client decided on 5-6 illustrations and wanted to pay $250 + royalties for the book. I was not sure if that would be a good price for that ammount of art.