The HP Slate 7 is beyond fashionably late to the Android tablet party, but it tries to make up for its tardiness with a very low price. When the device arrives in April, HP’s first Google-powered tablet just announced at this year’s Mobile World Congress will cost just $169. That’s $30 less than the the Nexus 7 and Amazon Kindle Fire HD. So how does this value-priced device stand out? HP is playing up the Slate 7′s Beats Audio sound and wireless printing capabilities.