Table:
text: B'z discography
Studio albums
Studio albums
Year_ Album Oricon_position _1st_week_sales Copies_sold
1988 B`z Release date: September 21, 1988 47 3,790+ 338,360+
1989 Off the Lock Release date: May 21, 1989 33 4,590+ 604,700+
1990 Break Through Release date: February 21, 1990 3 41,700+ 724,640+
1990 Risky Release date: November 7, 1990 1 314,770+ 1,695,900+
1991 In The Life Release date: November 27, 1991 1 1,043,070+ 2,402,970+
1992 Run Release date: October 28, 1992 1 1,190,380+ 2,196,660+
1994 The 7th Blues Release date: March 2, 1994 1 1,049,900+ 1,630,450+
1995 Loose Release date: November 22, 1995 1 1,336,150+ 3,003,210+
1997 Survive Release date: November 19, 1997 1 1,040,160+ 1,723,030+

Question: How many copies of the B'z discography were sold when first week sales were 4,590+?