Original sentence: Furthermore, customers who purchase a Macintosh between the time a new version of Mac OS X is announced and the time it starts shipping preinstalled on new machines have typically been given upgrades at a much smaller cost ($9.95-19.95 USD).In most cases, the upgrade price for Windows exceeds that of Mac OS X, suggesting that this criticism is moot.Meanwhile, the upgrade price for Windows varies substantially depending on volume purchase agreements, Home vs.Pro editions, etc.making direct comparisons difficult
Edited sentence: However, customers who purchase a Macintosh between the time a new version of Mac OS X is announced and the time it starts shipping preinstalled on new machines have typically been given upgrades at a much smaller cost ($9.95-19.95 USD)