Table schema:
CREATE TABLE table_11916083_1 (mintage__bu_ VARCHAR, _clarification_needed_ VARCHAR, artist VARCHAR, issue_price__proof_ VARCHAR)

Question: What is the mintage (bu) with the artist Royal Canadian Mint Staff and has an issue price (proof) of $54.95?
SQL: SELECT mintage__bu_[_clarification_needed_] FROM table_11916083_1 WHERE artist = "Royal Canadian Mint Staff" AND issue_price__proof_ = "$54.95"