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A sticker book has 100 stickers. A sticker paper has 10 stickers. Lillian and Josue have 5 sticker books and 4 sticker papers. Lillian says they have 450 stickers. Josue says they have 504 stickers. Who is right and why?

• Lillian is right. When you count by 100 four times and then count by 10 five times, you get 450 stickers.

• Josue is right. When you count by 100 five times and then add, 4 you get 504 stickers.

• Neither is right. When you count by 100 five times and then add 4, you get 54 stickers.

• Neither is right. When you count by 100 five times and then count by 10 four times, you get 540 stickers.