Hits Daily Double Sales Chart

[kak125]

this is what i found on billboard:
Unit sales for Albums priced below $3.49 during their first four weeks of release will not be eligible for inclusion on the Billboard album charts and will not count towards sales data presented by Nielsen SoundScan.
*The rule also applies to reissued titles.
*New Holiday/Seasonal titles must meet the minimum threshold through the final week of the calendar year.
*Unit sales for albums or EPs with 8 or less tracks will not be eligible for charting if the retail price is less than the sum of the tracks on the release, multiplied by $0.39.
*Minimum pricing for a multi-disc album (not a single disc with extra tracks), where the extra disc is audio content, will be $3.49 times the amount of discs being made available.