If you sign up, but don't use the membership, you won't be charged. The amount that you used your membership during the trial period has no impact on your ability to obtain a refund. For instance, if you buy a television on day two, you might get a refund of $99, minus the normal shipping charge for that television. This policy depends on exactly what you've bought. Those benefits include music and book downloads and streaming. If you do cancel, Amazon may charge you the regular prices for any Prime benefits you used during that three-day period.
