Nexus 7 cracked screen help

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http://www.mobileread.com – Bad luck! I cracked my nexus 7 screen just after I got it one month. The screen is unresponsive. I found this Nexus 7 LCD Screen and Digitizer Assembly. And also the Nexus 7 Digitizer Touch Screen. The LCD assembly is really too expensive. Hope I don't have to replace it. Which part do I have to replace? Anyone who know please help. (HowTos)