If the winner of an election is whoever receives the most votes, regardless of the percentage of votes received, the candidates are running under a system

plurality system

Explanation:

Plurality system -

It refers to as the electoral system , where an individual is allowed to vote only for one eligible candidate , and the candidate attaining maximum number of votes by the public is considered the winner , is referred to as plurality system .

It is also known as relative/simple majority , single-choice voting .

The method is adapted for the selection of the executive officers or legislative assembly .

Hence , from the given information of the question ,

The correct answer is plurality system .

what is the tax base for the sales tax?

it should be (usually ) 6%