are organizations created primarily to influence the nomination, election, or appointment of political candidates. There are no limits on the size of contributions made to these groups.

52 groups are organizations created primarily to influence the nomination, election, or appointment of political candidates. There are no limits on the size of contributions made to these groups.

Explanation:

A 527 is a non-profit organization created under Section 527 of the Internal Revenue Code, which yields tax-exempt status to political committees at the national, state and local level.  

These organizations are typically parties, applicants, representatives or associations formed to determine an effect, policy, appointment or election, be it federal, state or local. Such groups can suggest infinite funds from somebody, enterprises or labor unions, but they must enroll with the IRS and confess their donations and expenses.

what is the tax base for the sales tax?

it should be (usually ) 6%

can you explain a little further maybe give multiple choice? ?