As previously reported here is the math given official reports from Sony:
Sony reported PS2 shipped 155.1M as of March 2012 https://www.neogaf.com/threads/sony-q2-fy13-ps3-2-0-m.707013/
Sony reported PS3 shipped 63.9M as of March 2012 https://www.neogaf.com/threads/sony-q2-fy13-ps3-2-0-m.707013/
Sony combined PS2 and PS3 together as Computer Entertainment System and PSP + PSV as Portable Entertainment System for FY 2012 (April 2012 to March 2013) http://www.scei.co.jp/corporate/data/bizdata_hardware_e.html" class="link">https://web.archive.org/web/20130921081219/http://www.scei.co.jp/corporate/data/bizdata_hardware_e.html
PS2+PS3 shipped 16.5M for the 2012 FY http://www.scei.co.jp/corporate/data/bizdata_ces_sale_e.html" class="link">https://web.archive.org/web/20131014055001/http://www.scei.co.jp/corporate/data/bizdata_ces_sale_e.html
Sony announced PS3 surpassed 80M on November 2 2013 https://www.ign.com/articles/2013/11/06/ps3-sells-over-80-million-units-with-4332-games-released
Sony reported PS3 shipped 1.1M + 2.0M in Q2 + Q3 2013 https://www.neogaf.com/threads/sony-q2-fy13-ps3-2-0-m.707013/
Tally up 1.1M + 2.0M + 63.9M = 67M
PS3 cannot have passed 80M before November 2, 2013, meaning PS3's maximum shipment LTD as of September 2013 must be less than 80M.
79.9M - 67M = 12.9M as the absolute most PS3 could have shipped in FY 2012
16.5M - 12.9M = 3.6M left over for PS2
3.6M + 155.1M = 158.7M minimum.
We have it at 158.7 million because that is the minimum it could be at given what we know. It is likely Jim Ryan is rounding to 160 million. He could be rounding up or rounding down. We don't know one way or the other.
If Sony releases an official statement or we get something like the image Shawn Layden posted of the PSP with the exact number of units produced I will update our PS2 figures to match.
As far as accusing me being an Xbox fanboy. Sure, Halo is my favorite franchise. But I enjoy games from the big 3 - Xbox, PlayStation, and Nintendo. I'm just playing Xbox and PlayStation games on PC now, and use my Switch to play Nintendo games. Alan Wake 2 and God of War (2018) are 2 of my favorite games I've played over the last couple of years, and I am looking forward to playing God of War Ragnarök once it releases on PC.
When it comes to my work I try my best to leave any sort of biases out. Especially when it comes to doing the estimates. I take the data we collect, which is then extrapolated to get worldwide estimates. When more data becomes available - ie. quarterly reports from Sony and Nintendo that reveal shipment figures - we always adjust our estimates to be as accurate as possible.
VGChartz Sales Analyst and Writer - William D'Angelo - I stream on Twitch and have my own YouTube channel discussing gaming sales and news. Follow me on Bluesky.
I post and adjust the VGChartz hardware estimates, with help from Machina.
Writer of the Sales Comparison | Monthly Hardware Breakdown | Monthly Sales Analysis | Marketshare Features, as well as daily news on the Video Game Industry.