AMAZON.COM shipping? do they charge per seller you buy from? URGENT PLZ HELP?

i have to order this really quick, so ill be speedy about this. i am buying some stuff from amazon, and when i got to the purchasing page, it gave me different shipping options. i am ordering some things from different sellers. like, its offering me 4-14 business day shipping for some books, and 3-5 business day for my curling iron. does this mean that they will charge me for shipping for the books and the curling iron? like, i dont want to order if i have to pay like 6$ shipping for the iron, and then another 6$ for the books. thanks!