Samir paid $15.50 in shipping charges on a package that weighed 20 pounds.
If shipping costs a certain set amount per pound, what shipping charges would Samir pay on a 50-pound package?
Samir will pay $38.75 in shipping costs.
Samir will pay $45.50 in shipping costs.
Samir will pay $6.20 in shipping costs.
Samir will pay $21.70 in shipping costs.