Melanie has decided to run for president of her science club. She would like to purchase colorful bracelets that say, “Melanie for President!” She plans to pass out these colorful bracelets at the next meeting. There are twenty bracelets in each package. Each bracelet costs $3.50. How much will Melanie have to pay if she purchases two packages of colorful bracelets?

Melanie will have to pay for 2 packages of colorful bracelets, so the total cost will be:

20 bracelets/package * $3.50/bracelet * 2 packages = $140

Therefore, Melanie will have to pay $140 if she purchases two packages of colorful bracelets.