Table:
text: Royal Canadian Mint numismatic coins (2000s)
Commemorative Silver Dollar Series
Commemorative Silver Dollar Series
Year_ Artist Mintage_Proof Issue_Price_Proof Mintage_BU_clarification_needed_ Issue_Price_BU_clarification_needed_
2000 D.F. Warkentin 121575 $29.95 62975 $19.95
2001 Dora de Pédery-Hunt 89390 $30.95 53668 $20.95
2001 W.H.J. Blakemore 24996 $49.95 No BU Exists N/A
2002 Royal Canadian Mint Staff 29688 $33.95 64410 $24.95
2002 Royal Canadian Mint Staff 9994 $49.95 No BU exists N/A
2003 John Mardon 88536 $36.95 51130 $28.95
2003 Emanuel Hahn 21400 N/A No BU exists N/A
2003 Emanuel Hahn 29586 $51.95 No BU exists N/A
2004 R.R. Carmichael 81335 $36.95 41934 $28.95
2004 R.R. Carmichael 8315 $99.95 N/A N/A
2004 Cosme Saffioti 24527 $49.95 No BU Exists N/A
2005 William Woodruff N/A $34.95 N/A $24.95

Question: What is listed as Issue Price (BU) [clarification needed] with a mintage (proof) of 29,586 for Royal Canadian Mint (2000s) numismatic coins in the Silver Dollar Commemorative Series?

Question: Among the Royal Canadian Mint (2000s) Silver Dollar Commemorative Series numismatic coins, what is the average year with an issue price (proof) of $49.95 and an artist by WHJ Blakemore?