CREATE TABLE table_54147 ("Year" FLOAT, "Artist" TEXT, "Composition" TEXT, "Mintage" FLOAT, "Issue Price" TEXT)

What was the mintage having an issue price of $1,099.99, artist being Pamela Stagg?
SELECT AVG("Mintage") FROM table_54147 WHERE "Issue Price" = '$1,099.99' AND "Artist" = 'pamela stagg'
SELECT AVG("Mintage") FROM "table_54147" WHERE "Artist" = 'pamela stagg' AND "Issue Price" = '$1,099.99'