Read the passage then answer the questions.

       WHY DON’T YOU WANT TO BECOME A VOLUNTEER?

There are many reasons for becoming a volunteer. First, volunteering is good for you because it can provide physical and mental rewards. When you do voluntary work, you can reduce your stress and improve your health because you feel more joyful to bring happiness to other people. Second, volunteering saves money with valuable community services. For example, the estimated value of volunteer’s time is up to 15.39 USD per hour according to the recent statistics in America. Third, volunteering brings people together. Volunteers support families with daycare and eldercare, tutoring and other activities after school. They can create a close friendship in the community. Finally, doing voluntary work helps you develop your knowledge. You can learn a lot through outdoor activities and community services. It is easily understood that more and more people are doing voluntary work today because of these reasons.

Volunteering can save money because it provides the estimated value of volunteer’s time which is up to 15.39 USD ________.