You've had your Sony VGN-CR12E VAIO notebook for a couple of years and are looking for ways to improve its performance. You've cleaned up the hard drive and defragged it, and now you're considering the possibility of upgrading memory. Windows Vista reports the system has 2 GB of RAM. You open the cover on the bottom of the case and discover that both SO-DIMM slots are filled.
How much will the upgrade cost to bring total RAM in the system to 4 GB?
Print the web screen to support your answer.