Below are chart & sales summaries for the 90's "Best Of + B-sides", "Best Of" and their combined efforts. Many countries had combined the sales of both versions, which ranked the album higher on the charts. However, in the U.S., the albums were listed separately. Therefore, I wanted to make a "combined" list to show where the album would have ranked on the charts had the sales of both versions been combined. This last item, IMO, is a better indicator of the overall success of the 90's "Best Of".
90's "Best Of + B-sides":
Chart:
#3 - 27 - 49 - 62 - 80 - 91- 88 - 93 - 100 - 134
163 - 184 - out of Top 200
Sales:
184,804 + 59,694 + 31,512 + 36,916 + 26,344 + 33,292 + 44,681+ 33,055 + 13,613 + 7,469 + 6,017 + ~5,400+ ~4,000 + ~3,000 + ~3,000
Total Estimated Sales:
492,000
90's "Best Of":
Chart:
#34 - 57 - 49 - 58 - 56 - 58 - 64 - 88 - 94 - 115
117 - 154 - 171 - 166 - out of Top 200
Sales:
37,922 + 26,436 + 50,687 + 34,331 + 49,635 + 64,412 + 44,993 + 15,377 + 11,048 + 9,223 + 8,528 + 6,680 + 6,477 + 8,954 + ~5,400
Total Estimated Sales:
380,000
Combined:
Charts (estimated, theoretical position if sales were combined):
#3 - 13 - 30 - 29 - 35 - 37 - 39 - 40 - 45 - 52
62 - 65 - 87 - 119 - 125
Sales (combined weekly sales of both albums):
184,804 + 97,616 + 57,948 + 87,603 + 60,675 + 82,927 + 109,093 + 78,048 + 28,990 + 18,517 + 15,240 + ~13,900+ ~10,700 + ~9,500 + ~12,000
Total Estimated Sales (for both albums):
874,900
As shown, the combined sales have surpassed 870,000 copies in the U.S.
The "B-Sides" version of the album has officially sold close to 500,000 copies in the U.S. Due to RIAA rules, this should certify it as Platinum.
The single CD version should be certified as Gold. Note that sales increased for the single CD version this week (with a corresponding jump in the charts).
Since the RIAA has only one listing for this release, they clearly combined the sales. As such, the estimated sales of 875,000 copies (after the first 15 weeks ONLY), were enough to give it a Platinum ranking (as clearly the RIAA didn't count the b-side as an extra disk).