What person saved the most money by buying a product at the right time

Marlene, who waited six months to buy a phone

Explanation:

Hope this is the answer you were looking for. Next time add the multiple choice answers, so you can get a more accurate answer.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

“a committee reviews the bill and marks it up to make it more viable and to reflect interests