These are the fees for sending a package by media mail: $2.41 for the first pound $0.41 per additional pound for the next six pounds $0.39 per additional pound after that for example, a two-pound package costs $2.82 to send by media mail. if a package full of books costs $7.99 to send by media mail, how many pounds does the package weigh? explain your work in complete sentences. plz