Melanie has decided to run for president of her science club. She would like to purchase colorful rubber 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?

x = $?

First, find the cost of one package of bracelets by multiplying the cost per bracelet by the number of bracelets in a package: $3.50/bracelet * 20 bracelets = $<<3.5*20=70>>70/package

Then multiply the cost per package by the number of packages to find the total cost: $70/package * 2 packages = $<<70*2=140>>140. Answer: \boxed{140}.